diff --git a/src/main/java/com/maxio/advancedbilling/models/ACHAgreement.java b/src/main/java/com/maxio/advancedbilling/models/ACHAgreement.java
index b1de8b7c..5a3480fd 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ACHAgreement.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ACHAgreement.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ACHAgreement type.
  */
-public class ACHAgreement {
+public class ACHAgreement
+        extends BaseModel {
     private String agreementTerms;
     private String authorizerFirstName;
     private String authorizerLastName;
@@ -141,7 +143,8 @@ public void setIpAddress(String ipAddress) {
     public String toString() {
         return "ACHAgreement [" + "agreementTerms=" + agreementTerms + ", authorizerFirstName="
                 + authorizerFirstName + ", authorizerLastName=" + authorizerLastName
-                + ", ipAddress=" + ipAddress + "]";
+                + ", ipAddress=" + ipAddress + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AccountBalance.java b/src/main/java/com/maxio/advancedbilling/models/AccountBalance.java
index 89f11394..b9b31679 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AccountBalance.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AccountBalance.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for AccountBalance type.
  */
-public class AccountBalance {
+public class AccountBalance
+        extends BaseModel {
     private Long balanceInCents;
 
     /**
@@ -58,7 +60,8 @@ public void setBalanceInCents(Long balanceInCents) {
      */
     @Override
     public String toString() {
-        return "AccountBalance [" + "balanceInCents=" + balanceInCents + "]";
+        return "AccountBalance [" + "balanceInCents=" + balanceInCents + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AccountBalances.java b/src/main/java/com/maxio/advancedbilling/models/AccountBalances.java
index d70e978e..34989680 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AccountBalances.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AccountBalances.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for AccountBalances type.
  */
-public class AccountBalances {
+public class AccountBalances
+        extends BaseModel {
     private AccountBalance openInvoices;
     private AccountBalance pendingDiscounts;
     private AccountBalance serviceCredits;
@@ -135,7 +137,7 @@ public void setPrepayments(AccountBalance prepayments) {
     public String toString() {
         return "AccountBalances [" + "openInvoices=" + openInvoices + ", pendingDiscounts="
                 + pendingDiscounts + ", serviceCredits=" + serviceCredits + ", prepayments="
-                + prepayments + "]";
+                + prepayments + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ActivateSubscriptionRequest.java b/src/main/java/com/maxio/advancedbilling/models/ActivateSubscriptionRequest.java
index fea0b2c8..fac869e1 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ActivateSubscriptionRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ActivateSubscriptionRequest.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for ActivateSubscriptionRequest type.
  */
-public class ActivateSubscriptionRequest {
+public class ActivateSubscriptionRequest
+        extends BaseModel {
     private OptionalNullable<Boolean> revertOnFailure;
 
     /**
@@ -99,7 +101,8 @@ public void unsetRevertOnFailure() {
      */
     @Override
     public String toString() {
-        return "ActivateSubscriptionRequest [" + "revertOnFailure=" + revertOnFailure + "]";
+        return "ActivateSubscriptionRequest [" + "revertOnFailure=" + revertOnFailure
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AddCouponsRequest.java b/src/main/java/com/maxio/advancedbilling/models/AddCouponsRequest.java
index a2ce8a97..022fcfca 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AddCouponsRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AddCouponsRequest.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for AddCouponsRequest type.
  */
-public class AddCouponsRequest {
+public class AddCouponsRequest
+        extends BaseModel {
     private List<String> codes;
 
     /**
@@ -57,7 +59,8 @@ public void setCodes(List<String> codes) {
      */
     @Override
     public String toString() {
-        return "AddCouponsRequest [" + "codes=" + codes + "]";
+        return "AddCouponsRequest [" + "codes=" + codes + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AddSubscriptionToAGroup.java b/src/main/java/com/maxio/advancedbilling/models/AddSubscriptionToAGroup.java
index 44a53c2f..85a6b71e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AddSubscriptionToAGroup.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AddSubscriptionToAGroup.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.AddSubscriptionToAGroupGroup;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for AddSubscriptionToAGroup type.
  */
-public class AddSubscriptionToAGroup {
+public class AddSubscriptionToAGroup
+        extends BaseModel {
     private AddSubscriptionToAGroupGroup group;
 
     /**
@@ -57,7 +59,8 @@ public void setGroup(AddSubscriptionToAGroupGroup group) {
      */
     @Override
     public String toString() {
-        return "AddSubscriptionToAGroup [" + "group=" + group + "]";
+        return "AddSubscriptionToAGroup [" + "group=" + group + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AddressChange.java b/src/main/java/com/maxio/advancedbilling/models/AddressChange.java
index 6a9cb2a1..329d0b49 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AddressChange.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AddressChange.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for AddressChange type.
  */
-public class AddressChange {
+public class AddressChange
+        extends BaseModel {
     private InvoiceAddress before;
     private InvoiceAddress after;
 
@@ -79,7 +81,8 @@ public void setAfter(InvoiceAddress after) {
      */
     @Override
     public String toString() {
-        return "AddressChange [" + "before=" + before + ", after=" + after + "]";
+        return "AddressChange [" + "before=" + before + ", after=" + after
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AgreementAcceptance.java b/src/main/java/com/maxio/advancedbilling/models/AgreementAcceptance.java
index e5b5f41a..864f79e1 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AgreementAcceptance.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AgreementAcceptance.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for AgreementAcceptance type.
  */
-public class AgreementAcceptance {
+public class AgreementAcceptance
+        extends BaseModel {
     private String ipAddress;
     private String termsUrl;
     private String privacyPolicyUrl;
@@ -180,7 +182,8 @@ public String toString() {
         return "AgreementAcceptance [" + "ipAddress=" + ipAddress + ", termsUrl=" + termsUrl
                 + ", privacyPolicyUrl=" + privacyPolicyUrl + ", returnRefundPolicyUrl="
                 + returnRefundPolicyUrl + ", deliveryPolicyUrl=" + deliveryPolicyUrl
-                + ", secureCheckoutPolicyUrl=" + secureCheckoutPolicyUrl + "]";
+                + ", secureCheckoutPolicyUrl=" + secureCheckoutPolicyUrl + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AllocateComponents.java b/src/main/java/com/maxio/advancedbilling/models/AllocateComponents.java
index 60d7879b..d4c31e67 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AllocateComponents.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AllocateComponents.java
@@ -10,13 +10,15 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.util.List;
 
 /**
  * This is a model class for AllocateComponents type.
  */
-public class AllocateComponents {
+public class AllocateComponents
+        extends BaseModel {
     private String prorationUpgradeScheme;
     private String prorationDowngradeScheme;
     private List<CreateAllocation> allocations;
@@ -308,7 +310,7 @@ public String toString() {
                 + allocations + ", accrueCharge=" + accrueCharge + ", upgradeCharge="
                 + upgradeCharge + ", downgradeCredit=" + downgradeCredit
                 + ", paymentCollectionMethod=" + paymentCollectionMethod + ", initiateDunning="
-                + initiateDunning + "]";
+                + initiateDunning + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Allocation.java b/src/main/java/com/maxio/advancedbilling/models/Allocation.java
index 8a0563d1..297a6f0b 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Allocation.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Allocation.java
@@ -15,13 +15,15 @@
 import com.maxio.advancedbilling.models.containers.AllocationPayment;
 import com.maxio.advancedbilling.models.containers.AllocationPreviousQuantity;
 import com.maxio.advancedbilling.models.containers.AllocationQuantity;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for Allocation type.
  */
-public class Allocation {
+public class Allocation
+        extends BaseModel {
     private Integer allocationId;
     private Integer componentId;
     private OptionalNullable<String> componentHandle;
@@ -780,7 +782,7 @@ public String toString() {
                 + ", previousPricePointId=" + previousPricePointId + ", accrueCharge="
                 + accrueCharge + ", initiateDunning=" + initiateDunning + ", upgradeCharge="
                 + upgradeCharge + ", downgradeCredit=" + downgradeCredit + ", payment=" + payment
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AllocationExpirationDate.java b/src/main/java/com/maxio/advancedbilling/models/AllocationExpirationDate.java
index b271e5a5..196cf0a2 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AllocationExpirationDate.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AllocationExpirationDate.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for AllocationExpirationDate type.
  */
-public class AllocationExpirationDate {
+public class AllocationExpirationDate
+        extends BaseModel {
     private ZonedDateTime expiresAt;
 
     /**
@@ -62,7 +64,8 @@ public void setExpiresAt(ZonedDateTime expiresAt) {
      */
     @Override
     public String toString() {
-        return "AllocationExpirationDate [" + "expiresAt=" + expiresAt + "]";
+        return "AllocationExpirationDate [" + "expiresAt=" + expiresAt + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AllocationPreview.java b/src/main/java/com/maxio/advancedbilling/models/AllocationPreview.java
index d5d3661c..0e3480c3 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AllocationPreview.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AllocationPreview.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 import java.util.List;
 
 /**
  * This is a model class for AllocationPreview type.
  */
-public class AllocationPreview {
+public class AllocationPreview
+        extends BaseModel {
     private ZonedDateTime startDate;
     private ZonedDateTime endDate;
     private Long subtotalInCents;
@@ -349,7 +351,8 @@ public String toString() {
                 + totalInCents + ", direction=" + direction + ", prorationScheme=" + prorationScheme
                 + ", lineItems=" + lineItems + ", accrueCharge=" + accrueCharge + ", allocations="
                 + allocations + ", periodType=" + periodType + ", existingBalanceInCents="
-                + existingBalanceInCents + "]";
+                + existingBalanceInCents + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AllocationPreviewItem.java b/src/main/java/com/maxio/advancedbilling/models/AllocationPreviewItem.java
index 29ac3f4e..2a9384ec 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AllocationPreviewItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AllocationPreviewItem.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.models.containers.AllocationPreviewItemPreviousQuantity;
 import com.maxio.advancedbilling.models.containers.AllocationPreviewItemQuantity;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for AllocationPreviewItem type.
  */
-public class AllocationPreviewItem {
+public class AllocationPreviewItem
+        extends BaseModel {
     private Integer componentId;
     private Integer subscriptionId;
     private AllocationPreviewItemQuantity quantity;
@@ -618,7 +620,7 @@ public String toString() {
                 + ", intervalUnit=" + intervalUnit + ", previousPricePointId="
                 + previousPricePointId + ", pricePointHandle=" + pricePointHandle
                 + ", pricePointName=" + pricePointName + ", componentHandle=" + componentHandle
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AllocationPreviewLineItem.java b/src/main/java/com/maxio/advancedbilling/models/AllocationPreviewLineItem.java
index 836968ec..2fb93f28 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AllocationPreviewLineItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AllocationPreviewLineItem.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for AllocationPreviewLineItem type.
  */
-public class AllocationPreviewLineItem {
+public class AllocationPreviewLineItem
+        extends BaseModel {
     private LineItemTransactionType transactionType;
     private AllocationPreviewLineItemKind kind;
     private Long amountInCents;
@@ -250,7 +252,8 @@ public String toString() {
                 + kind + ", amountInCents=" + amountInCents + ", memo=" + memo
                 + ", discountAmountInCents=" + discountAmountInCents + ", taxableAmountInCents="
                 + taxableAmountInCents + ", componentId=" + componentId + ", componentHandle="
-                + componentHandle + ", direction=" + direction + "]";
+                + componentHandle + ", direction=" + direction + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AllocationPreviewResponse.java b/src/main/java/com/maxio/advancedbilling/models/AllocationPreviewResponse.java
index 9fd7503c..6e0bfeea 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AllocationPreviewResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AllocationPreviewResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for AllocationPreviewResponse type.
  */
-public class AllocationPreviewResponse {
+public class AllocationPreviewResponse
+        extends BaseModel {
     private AllocationPreview allocationPreview;
 
     /**
@@ -54,7 +56,8 @@ public void setAllocationPreview(AllocationPreview allocationPreview) {
      */
     @Override
     public String toString() {
-        return "AllocationPreviewResponse [" + "allocationPreview=" + allocationPreview + "]";
+        return "AllocationPreviewResponse [" + "allocationPreview=" + allocationPreview
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AllocationResponse.java b/src/main/java/com/maxio/advancedbilling/models/AllocationResponse.java
index ffe13155..6bf15199 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AllocationResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AllocationResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for AllocationResponse type.
  */
-public class AllocationResponse {
+public class AllocationResponse
+        extends BaseModel {
     private Allocation allocation;
 
     /**
@@ -56,7 +58,8 @@ public void setAllocation(Allocation allocation) {
      */
     @Override
     public String toString() {
-        return "AllocationResponse [" + "allocation=" + allocation + "]";
+        return "AllocationResponse [" + "allocation=" + allocation + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AllocationSettings.java b/src/main/java/com/maxio/advancedbilling/models/AllocationSettings.java
index 7b01b306..d832883c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AllocationSettings.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AllocationSettings.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for AllocationSettings type.
  */
-public class AllocationSettings {
+public class AllocationSettings
+        extends BaseModel {
     private OptionalNullable<CreditType> upgradeCharge;
     private OptionalNullable<CreditType> downgradeCredit;
     private String accrueCharge;
@@ -169,7 +171,8 @@ public void setAccrueCharge(String accrueCharge) {
     @Override
     public String toString() {
         return "AllocationSettings [" + "upgradeCharge=" + upgradeCharge + ", downgradeCredit="
-                + downgradeCredit + ", accrueCharge=" + accrueCharge + "]";
+                + downgradeCredit + ", accrueCharge=" + accrueCharge + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AppliedCreditNoteData.java b/src/main/java/com/maxio/advancedbilling/models/AppliedCreditNoteData.java
index 972d262b..5e6656df 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AppliedCreditNoteData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AppliedCreditNoteData.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for AppliedCreditNoteData type.
  */
-public class AppliedCreditNoteData {
+public class AppliedCreditNoteData
+        extends BaseModel {
     private String uid;
     private String number;
 
@@ -83,7 +85,8 @@ public void setNumber(String number) {
      */
     @Override
     public String toString() {
-        return "AppliedCreditNoteData [" + "uid=" + uid + ", number=" + number + "]";
+        return "AppliedCreditNoteData [" + "uid=" + uid + ", number=" + number
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ApplyCreditNoteEventData.java b/src/main/java/com/maxio/advancedbilling/models/ApplyCreditNoteEventData.java
index f4c4e8ef..c50bc6b1 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ApplyCreditNoteEventData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ApplyCreditNoteEventData.java
@@ -14,13 +14,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 import java.util.List;
 
 /**
  * This is a model class for ApplyCreditNoteEventData type.
  */
-public class ApplyCreditNoteEventData {
+public class ApplyCreditNoteEventData
+        extends BaseModel {
     private String uid;
     private String creditNoteNumber;
     private String creditNoteUid;
@@ -314,7 +316,8 @@ public String toString() {
                 + creditNoteNumber + ", creditNoteUid=" + creditNoteUid + ", originalAmount="
                 + originalAmount + ", appliedAmount=" + appliedAmount + ", transactionTime="
                 + transactionTime + ", memo=" + memo + ", role=" + role + ", consolidatedInvoice="
-                + consolidatedInvoice + ", appliedCreditNotes=" + appliedCreditNotes + "]";
+                + consolidatedInvoice + ", appliedCreditNotes=" + appliedCreditNotes
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ApplyDebitNoteEventData.java b/src/main/java/com/maxio/advancedbilling/models/ApplyDebitNoteEventData.java
index a6e2aa61..7988cc95 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ApplyDebitNoteEventData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ApplyDebitNoteEventData.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ApplyDebitNoteEventData type.
  */
-public class ApplyDebitNoteEventData {
+public class ApplyDebitNoteEventData
+        extends BaseModel {
     private String debitNoteNumber;
     private String debitNoteUid;
     private String originalAmount;
@@ -135,7 +137,8 @@ public void setAppliedAmount(String appliedAmount) {
     public String toString() {
         return "ApplyDebitNoteEventData [" + "debitNoteNumber=" + debitNoteNumber
                 + ", debitNoteUid=" + debitNoteUid + ", originalAmount=" + originalAmount
-                + ", appliedAmount=" + appliedAmount + "]";
+                + ", appliedAmount=" + appliedAmount + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ApplyPaymentEventData.java b/src/main/java/com/maxio/advancedbilling/models/ApplyPaymentEventData.java
index 3af893ba..5b093f7d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ApplyPaymentEventData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ApplyPaymentEventData.java
@@ -15,13 +15,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
 import com.maxio.advancedbilling.models.containers.InvoiceEventPayment;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for ApplyPaymentEventData type.
  */
-public class ApplyPaymentEventData {
+public class ApplyPaymentEventData
+        extends BaseModel {
     private String memo;
     private String originalAmount;
     private String appliedAmount;
@@ -381,7 +383,7 @@ public String toString() {
                 + ", paymentMethod=" + paymentMethod + ", transactionId=" + transactionId
                 + ", parentInvoiceNumber=" + parentInvoiceNumber + ", remainingPrepaymentAmount="
                 + remainingPrepaymentAmount + ", prepayment=" + prepayment + ", external="
-                + external + "]";
+                + external + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AttributeError.java b/src/main/java/com/maxio/advancedbilling/models/AttributeError.java
index 03b804ed..7fbba592 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AttributeError.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AttributeError.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for AttributeError type.
  */
-public class AttributeError {
+public class AttributeError
+        extends BaseModel {
     private List<String> attribute;
 
     /**
@@ -55,7 +57,8 @@ public void setAttribute(List<String> attribute) {
      */
     @Override
     public String toString() {
-        return "AttributeError [" + "attribute=" + attribute + "]";
+        return "AttributeError [" + "attribute=" + attribute + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/AutoResume.java b/src/main/java/com/maxio/advancedbilling/models/AutoResume.java
index f7dacc44..23bea36f 100644
--- a/src/main/java/com/maxio/advancedbilling/models/AutoResume.java
+++ b/src/main/java/com/maxio/advancedbilling/models/AutoResume.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for AutoResume type.
  */
-public class AutoResume {
+public class AutoResume
+        extends BaseModel {
     private OptionalNullable<ZonedDateTime> automaticallyResumeAt;
 
     /**
@@ -87,7 +89,8 @@ public void unsetAutomaticallyResumeAt() {
      */
     @Override
     public String toString() {
-        return "AutoResume [" + "automaticallyResumeAt=" + automaticallyResumeAt + "]";
+        return "AutoResume [" + "automaticallyResumeAt=" + automaticallyResumeAt
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BankAccountAttributes.java b/src/main/java/com/maxio/advancedbilling/models/BankAccountAttributes.java
index a11544cb..da9a6224 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BankAccountAttributes.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BankAccountAttributes.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for BankAccountAttributes type.
  */
-public class BankAccountAttributes {
+public class BankAccountAttributes
+        extends BaseModel {
     private String chargifyToken;
     private String bankName;
     private String bankRoutingNumber;
@@ -347,7 +349,7 @@ public String toString() {
                 + bankBranchCode + ", bankIban=" + bankIban + ", bankAccountHolderType="
                 + bankAccountHolderType + ", paymentType=" + paymentType + ", currentVault="
                 + currentVault + ", vaultToken=" + vaultToken + ", customerVaultToken="
-                + customerVaultToken + "]";
+                + customerVaultToken + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BankAccountPaymentProfile.java b/src/main/java/com/maxio/advancedbilling/models/BankAccountPaymentProfile.java
index 5b85058d..fca61430 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BankAccountPaymentProfile.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BankAccountPaymentProfile.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for BankAccountPaymentProfile type.
  */
-public class BankAccountPaymentProfile {
+public class BankAccountPaymentProfile
+        extends BaseModel {
     private Integer id;
     private String firstName;
     private String lastName;
@@ -849,7 +851,7 @@ public String toString() {
                 + bankName + ", bankAccountType=" + bankAccountType + ", bankAccountHolderType="
                 + bankAccountHolderType + ", paymentType=" + paymentType + ", verified=" + verified
                 + ", siteGatewaySettingId=" + siteGatewaySettingId + ", gatewayHandle="
-                + gatewayHandle + "]";
+                + gatewayHandle + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BankAccountResponse.java b/src/main/java/com/maxio/advancedbilling/models/BankAccountResponse.java
index 062f7693..ce9e92b1 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BankAccountResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BankAccountResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for BankAccountResponse type.
  */
-public class BankAccountResponse {
+public class BankAccountResponse
+        extends BaseModel {
     private BankAccountPaymentProfile paymentProfile;
 
     /**
@@ -54,7 +56,8 @@ public void setPaymentProfile(BankAccountPaymentProfile paymentProfile) {
      */
     @Override
     public String toString() {
-        return "BankAccountResponse [" + "paymentProfile=" + paymentProfile + "]";
+        return "BankAccountResponse [" + "paymentProfile=" + paymentProfile
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BankAccountVerification.java b/src/main/java/com/maxio/advancedbilling/models/BankAccountVerification.java
index 4a8d8aa6..e208ad33 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BankAccountVerification.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BankAccountVerification.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for BankAccountVerification type.
  */
-public class BankAccountVerification {
+public class BankAccountVerification
+        extends BaseModel {
     private Long deposit1InCents;
     private Long deposit2InCents;
 
@@ -80,7 +82,8 @@ public void setDeposit2InCents(Long deposit2InCents) {
     @Override
     public String toString() {
         return "BankAccountVerification [" + "deposit1InCents=" + deposit1InCents
-                + ", deposit2InCents=" + deposit2InCents + "]";
+                + ", deposit2InCents=" + deposit2InCents + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BankAccountVerificationRequest.java b/src/main/java/com/maxio/advancedbilling/models/BankAccountVerificationRequest.java
index eafe2b42..0cc58f70 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BankAccountVerificationRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BankAccountVerificationRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for BankAccountVerificationRequest type.
  */
-public class BankAccountVerificationRequest {
+public class BankAccountVerificationRequest
+        extends BaseModel {
     private BankAccountVerification bankAccountVerification;
 
     /**
@@ -55,7 +57,8 @@ public void setBankAccountVerification(BankAccountVerification bankAccountVerifi
     @Override
     public String toString() {
         return "BankAccountVerificationRequest [" + "bankAccountVerification="
-                + bankAccountVerification + "]";
+                + bankAccountVerification + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BaseRefundError.java b/src/main/java/com/maxio/advancedbilling/models/BaseRefundError.java
index bcc545de..ffa57a95 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BaseRefundError.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BaseRefundError.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for BaseRefundError type.
  */
-public class BaseRefundError {
+public class BaseRefundError
+        extends BaseModel {
     private List<Object> base;
 
     /**
@@ -57,7 +59,8 @@ public void setBase(List<Object> base) {
      */
     @Override
     public String toString() {
-        return "BaseRefundError [" + "base=" + base + "]";
+        return "BaseRefundError [" + "base=" + base + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BaseStringError.java b/src/main/java/com/maxio/advancedbilling/models/BaseStringError.java
index 907c247f..9ea6dac2 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BaseStringError.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BaseStringError.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for BaseStringError type.
  */
-public class BaseStringError {
+public class BaseStringError
+        extends BaseModel {
     private List<String> base;
 
     /**
@@ -57,7 +59,8 @@ public void setBase(List<String> base) {
      */
     @Override
     public String toString() {
-        return "BaseStringError [" + "base=" + base + "]";
+        return "BaseStringError [" + "base=" + base + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BatchJob.java b/src/main/java/com/maxio/advancedbilling/models/BatchJob.java
index 2fea7ac7..782e3d38 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BatchJob.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BatchJob.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for BatchJob type.
  */
-public class BatchJob {
+public class BatchJob
+        extends BaseModel {
     private Integer id;
     private OptionalNullable<ZonedDateTime> finishedAt;
     private OptionalNullable<Integer> rowCount;
@@ -223,7 +225,8 @@ public void setCompleted(String completed) {
     @Override
     public String toString() {
         return "BatchJob [" + "id=" + id + ", finishedAt=" + finishedAt + ", rowCount=" + rowCount
-                + ", createdAt=" + createdAt + ", completed=" + completed + "]";
+                + ", createdAt=" + createdAt + ", completed=" + completed
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BatchJobResponse.java b/src/main/java/com/maxio/advancedbilling/models/BatchJobResponse.java
index a348d6a2..8f033bd9 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BatchJobResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BatchJobResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for BatchJobResponse type.
  */
-public class BatchJobResponse {
+public class BatchJobResponse
+        extends BaseModel {
     private BatchJob batchjob;
 
     /**
@@ -54,7 +56,8 @@ public void setBatchjob(BatchJob batchjob) {
      */
     @Override
     public String toString() {
-        return "BatchJobResponse [" + "batchjob=" + batchjob + "]";
+        return "BatchJobResponse [" + "batchjob=" + batchjob + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BillingAddress.java b/src/main/java/com/maxio/advancedbilling/models/BillingAddress.java
index fcac3522..2d32c455 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BillingAddress.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BillingAddress.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for BillingAddress type.
  */
-public class BillingAddress {
+public class BillingAddress
+        extends BaseModel {
     private OptionalNullable<String> street;
     private OptionalNullable<String> line2;
     private OptionalNullable<String> city;
@@ -291,7 +293,8 @@ public void unsetCountry() {
     @Override
     public String toString() {
         return "BillingAddress [" + "street=" + street + ", line2=" + line2 + ", city=" + city
-                + ", state=" + state + ", zip=" + zip + ", country=" + country + "]";
+                + ", state=" + state + ", zip=" + zip + ", country=" + country
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BillingManifest.java b/src/main/java/com/maxio/advancedbilling/models/BillingManifest.java
index 2fbd0ca4..68690472 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BillingManifest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BillingManifest.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 import java.util.List;
 
 /**
  * This is a model class for BillingManifest type.
  */
-public class BillingManifest {
+public class BillingManifest
+        extends BaseModel {
     private List<BillingManifestItem> lineItems;
     private Long totalInCents;
     private Long totalDiscountInCents;
@@ -253,7 +255,8 @@ public String toString() {
                 + ", totalDiscountInCents=" + totalDiscountInCents + ", totalTaxInCents="
                 + totalTaxInCents + ", subtotalInCents=" + subtotalInCents + ", startDate="
                 + startDate + ", endDate=" + endDate + ", periodType=" + periodType
-                + ", existingBalanceInCents=" + existingBalanceInCents + "]";
+                + ", existingBalanceInCents=" + existingBalanceInCents + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BillingManifestItem.java b/src/main/java/com/maxio/advancedbilling/models/BillingManifestItem.java
index 740a7e5b..9dddf6fd 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BillingManifestItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BillingManifestItem.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for BillingManifestItem type.
  */
-public class BillingManifestItem {
+public class BillingManifestItem
+        extends BaseModel {
     private LineItemTransactionType transactionType;
     private BillingManifestLineItemKind kind;
     private Long amountInCents;
@@ -366,7 +368,7 @@ public String toString() {
                 + ", componentName=" + componentName + ", productId=" + productId
                 + ", productHandle=" + productHandle + ", productName=" + productName
                 + ", periodRangeStart=" + periodRangeStart + ", periodRangeEnd=" + periodRangeEnd
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BillingSchedule.java b/src/main/java/com/maxio/advancedbilling/models/BillingSchedule.java
index c4e86546..1a783ed1 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BillingSchedule.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BillingSchedule.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.LocalDate;
 
 /**
  * This is a model class for BillingSchedule type.
  */
-public class BillingSchedule {
+public class BillingSchedule
+        extends BaseModel {
     private LocalDate initialBillingAt;
 
     /**
@@ -68,7 +70,8 @@ public void setInitialBillingAt(LocalDate initialBillingAt) {
      */
     @Override
     public String toString() {
-        return "BillingSchedule [" + "initialBillingAt=" + initialBillingAt + "]";
+        return "BillingSchedule [" + "initialBillingAt=" + initialBillingAt
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Breakouts.java b/src/main/java/com/maxio/advancedbilling/models/Breakouts.java
index faf67f6b..b3779b46 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Breakouts.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Breakouts.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for Breakouts type.
  */
-public class Breakouts {
+public class Breakouts
+        extends BaseModel {
     private Long planAmountInCents;
     private String planAmountFormatted;
     private Long usageAmountInCents;
@@ -127,7 +129,8 @@ public void setUsageAmountFormatted(String usageAmountFormatted) {
     public String toString() {
         return "Breakouts [" + "planAmountInCents=" + planAmountInCents + ", planAmountFormatted="
                 + planAmountFormatted + ", usageAmountInCents=" + usageAmountInCents
-                + ", usageAmountFormatted=" + usageAmountFormatted + "]";
+                + ", usageAmountFormatted=" + usageAmountFormatted + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BulkComponentSPricePointAssignment.java b/src/main/java/com/maxio/advancedbilling/models/BulkComponentSPricePointAssignment.java
index f2db38e6..96847a10 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BulkComponentSPricePointAssignment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BulkComponentSPricePointAssignment.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for BulkComponentSPricePointAssignment type.
  */
-public class BulkComponentSPricePointAssignment {
+public class BulkComponentSPricePointAssignment
+        extends BaseModel {
     private List<ComponentSPricePointAssignment> components;
 
     /**
@@ -57,7 +59,8 @@ public void setComponents(List<ComponentSPricePointAssignment> components) {
      */
     @Override
     public String toString() {
-        return "BulkComponentSPricePointAssignment [" + "components=" + components + "]";
+        return "BulkComponentSPricePointAssignment [" + "components=" + components
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BulkCreateProductPricePointsRequest.java b/src/main/java/com/maxio/advancedbilling/models/BulkCreateProductPricePointsRequest.java
index c0744c2b..b7ebc356 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BulkCreateProductPricePointsRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BulkCreateProductPricePointsRequest.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for BulkCreateProductPricePointsRequest type.
  */
-public class BulkCreateProductPricePointsRequest {
+public class BulkCreateProductPricePointsRequest
+        extends BaseModel {
     private List<CreateProductPricePoint> pricePoints;
 
     /**
@@ -55,7 +57,8 @@ public void setPricePoints(List<CreateProductPricePoint> pricePoints) {
      */
     @Override
     public String toString() {
-        return "BulkCreateProductPricePointsRequest [" + "pricePoints=" + pricePoints + "]";
+        return "BulkCreateProductPricePointsRequest [" + "pricePoints=" + pricePoints
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BulkCreateProductPricePointsResponse.java b/src/main/java/com/maxio/advancedbilling/models/BulkCreateProductPricePointsResponse.java
index cd09da0e..c189cd96 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BulkCreateProductPricePointsResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BulkCreateProductPricePointsResponse.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for BulkCreateProductPricePointsResponse type.
  */
-public class BulkCreateProductPricePointsResponse {
+public class BulkCreateProductPricePointsResponse
+        extends BaseModel {
     private List<ProductPricePoint> pricePoints;
 
     /**
@@ -57,7 +59,8 @@ public void setPricePoints(List<ProductPricePoint> pricePoints) {
      */
     @Override
     public String toString() {
-        return "BulkCreateProductPricePointsResponse [" + "pricePoints=" + pricePoints + "]";
+        return "BulkCreateProductPricePointsResponse [" + "pricePoints=" + pricePoints
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BulkCreateSegments.java b/src/main/java/com/maxio/advancedbilling/models/BulkCreateSegments.java
index fa5b128f..0792fb60 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BulkCreateSegments.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BulkCreateSegments.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for BulkCreateSegments type.
  */
-public class BulkCreateSegments {
+public class BulkCreateSegments
+        extends BaseModel {
     private List<CreateSegment> segments;
 
     /**
@@ -57,7 +59,8 @@ public void setSegments(List<CreateSegment> segments) {
      */
     @Override
     public String toString() {
-        return "BulkCreateSegments [" + "segments=" + segments + "]";
+        return "BulkCreateSegments [" + "segments=" + segments + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BulkUpdateSegments.java b/src/main/java/com/maxio/advancedbilling/models/BulkUpdateSegments.java
index a9f58fa7..97fe9914 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BulkUpdateSegments.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BulkUpdateSegments.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for BulkUpdateSegments type.
  */
-public class BulkUpdateSegments {
+public class BulkUpdateSegments
+        extends BaseModel {
     private List<BulkUpdateSegmentsItem> segments;
 
     /**
@@ -57,7 +59,8 @@ public void setSegments(List<BulkUpdateSegmentsItem> segments) {
      */
     @Override
     public String toString() {
-        return "BulkUpdateSegments [" + "segments=" + segments + "]";
+        return "BulkUpdateSegments [" + "segments=" + segments + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/BulkUpdateSegmentsItem.java b/src/main/java/com/maxio/advancedbilling/models/BulkUpdateSegmentsItem.java
index ca0e9a20..4ca3f9c9 100644
--- a/src/main/java/com/maxio/advancedbilling/models/BulkUpdateSegmentsItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/BulkUpdateSegmentsItem.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for BulkUpdateSegmentsItem type.
  */
-public class BulkUpdateSegmentsItem {
+public class BulkUpdateSegmentsItem
+        extends BaseModel {
     private int id;
     private PricingScheme pricingScheme;
     private List<CreateOrUpdateSegmentPrice> prices;
@@ -108,7 +110,8 @@ public void setPrices(List<CreateOrUpdateSegmentPrice> prices) {
     @Override
     public String toString() {
         return "BulkUpdateSegmentsItem [" + "id=" + id + ", pricingScheme=" + pricingScheme
-                + ", prices=" + prices + "]";
+                + ", prices=" + prices + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CalendarBilling.java b/src/main/java/com/maxio/advancedbilling/models/CalendarBilling.java
index 733916e1..bd6790ef 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CalendarBilling.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CalendarBilling.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.CalendarBillingSnapDay;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CalendarBilling type.
  */
-public class CalendarBilling {
+public class CalendarBilling
+        extends BaseModel {
     private CalendarBillingSnapDay snapDay;
     private FirstChargeType calendarBillingFirstCharge;
 
@@ -83,7 +85,8 @@ public void setCalendarBillingFirstCharge(FirstChargeType calendarBillingFirstCh
     @Override
     public String toString() {
         return "CalendarBilling [" + "snapDay=" + snapDay + ", calendarBillingFirstCharge="
-                + calendarBillingFirstCharge + "]";
+                + calendarBillingFirstCharge + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CancelGroupedSubscriptionsRequest.java b/src/main/java/com/maxio/advancedbilling/models/CancelGroupedSubscriptionsRequest.java
index 4f2bf0d3..d36763f9 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CancelGroupedSubscriptionsRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CancelGroupedSubscriptionsRequest.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CancelGroupedSubscriptionsRequest type.
  */
-public class CancelGroupedSubscriptionsRequest {
+public class CancelGroupedSubscriptionsRequest
+        extends BaseModel {
     private Boolean chargeUnbilledUsage;
 
     /**
@@ -57,7 +59,7 @@ public void setChargeUnbilledUsage(Boolean chargeUnbilledUsage) {
     @Override
     public String toString() {
         return "CancelGroupedSubscriptionsRequest [" + "chargeUnbilledUsage=" + chargeUnbilledUsage
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CancellationOptions.java b/src/main/java/com/maxio/advancedbilling/models/CancellationOptions.java
index eda943b9..8ee0d214 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CancellationOptions.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CancellationOptions.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CancellationOptions type.
  */
-public class CancellationOptions {
+public class CancellationOptions
+        extends BaseModel {
     private String cancellationMessage;
     private String reasonCode;
 
@@ -86,7 +88,8 @@ public void setReasonCode(String reasonCode) {
     @Override
     public String toString() {
         return "CancellationOptions [" + "cancellationMessage=" + cancellationMessage
-                + ", reasonCode=" + reasonCode + "]";
+                + ", reasonCode=" + reasonCode + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CancellationRequest.java b/src/main/java/com/maxio/advancedbilling/models/CancellationRequest.java
index affd434f..cd2aa7f2 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CancellationRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CancellationRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CancellationRequest type.
  */
-public class CancellationRequest {
+public class CancellationRequest
+        extends BaseModel {
     private CancellationOptions subscription;
 
     /**
@@ -54,7 +56,8 @@ public void setSubscription(CancellationOptions subscription) {
      */
     @Override
     public String toString() {
-        return "CancellationRequest [" + "subscription=" + subscription + "]";
+        return "CancellationRequest [" + "subscription=" + subscription + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ChangeInvoiceCollectionMethodEventData.java b/src/main/java/com/maxio/advancedbilling/models/ChangeInvoiceCollectionMethodEventData.java
index e3cb5bfb..7891ab73 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ChangeInvoiceCollectionMethodEventData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ChangeInvoiceCollectionMethodEventData.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ChangeInvoiceCollectionMethodEventData type.
  */
-public class ChangeInvoiceCollectionMethodEventData {
+public class ChangeInvoiceCollectionMethodEventData
+        extends BaseModel {
     private String fromCollectionMethod;
     private String toCollectionMethod;
 
@@ -84,7 +86,8 @@ public void setToCollectionMethod(String toCollectionMethod) {
     @Override
     public String toString() {
         return "ChangeInvoiceCollectionMethodEventData [" + "fromCollectionMethod="
-                + fromCollectionMethod + ", toCollectionMethod=" + toCollectionMethod + "]";
+                + fromCollectionMethod + ", toCollectionMethod=" + toCollectionMethod
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ChargifyEBB.java b/src/main/java/com/maxio/advancedbilling/models/ChargifyEBB.java
index 0963c665..be44c08d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ChargifyEBB.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ChargifyEBB.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for ChargifyEBB type.
  */
-public class ChargifyEBB {
+public class ChargifyEBB
+        extends BaseModel {
     private ZonedDateTime timestamp;
     private String id;
     private ZonedDateTime createdAt;
@@ -213,7 +215,8 @@ public void setSubscriptionReference(String subscriptionReference) {
     public String toString() {
         return "ChargifyEBB [" + "timestamp=" + timestamp + ", id=" + id + ", createdAt="
                 + createdAt + ", uniquenessToken=" + uniquenessToken + ", subscriptionId="
-                + subscriptionId + ", subscriptionReference=" + subscriptionReference + "]";
+                + subscriptionId + ", subscriptionReference=" + subscriptionReference
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Component.java b/src/main/java/com/maxio/advancedbilling/models/Component.java
index b66be8df..741ae3d2 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Component.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Component.java
@@ -13,6 +13,7 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
 import com.maxio.advancedbilling.models.containers.ComponentPricingScheme;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 import java.util.List;
@@ -20,7 +21,8 @@
 /**
  * This is a model class for Component type.
  */
-public class Component {
+public class Component
+        extends BaseModel {
     private Integer id;
     private String name;
     private OptionalNullable<String> handle;
@@ -1297,7 +1299,7 @@ public String toString() {
                 + itemCategory + ", useSiteExchangeRate=" + useSiteExchangeRate
                 + ", accountingCode=" + accountingCode + ", eventBasedBillingMetricId="
                 + eventBasedBillingMetricId + ", interval=" + interval + ", intervalUnit="
-                + intervalUnit + "]";
+                + intervalUnit + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ComponentAllocationChange.java b/src/main/java/com/maxio/advancedbilling/models/ComponentAllocationChange.java
index 97810684..5ccd6bce 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ComponentAllocationChange.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ComponentAllocationChange.java
@@ -12,11 +12,13 @@
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.ComponentAllocationChangeAllocatedQuantity;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ComponentAllocationChange type.
  */
-public class ComponentAllocationChange {
+public class ComponentAllocationChange
+        extends BaseModel {
     private int previousAllocation;
     private int newAllocation;
     private int componentId;
@@ -216,7 +218,8 @@ public String toString() {
         return "ComponentAllocationChange [" + "previousAllocation=" + previousAllocation
                 + ", newAllocation=" + newAllocation + ", componentId=" + componentId
                 + ", componentHandle=" + componentHandle + ", memo=" + memo + ", allocationId="
-                + allocationId + ", allocatedQuantity=" + allocatedQuantity + "]";
+                + allocationId + ", allocatedQuantity=" + allocatedQuantity
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ComponentAllocationErrorItem.java b/src/main/java/com/maxio/advancedbilling/models/ComponentAllocationErrorItem.java
index d0d9064e..7dee6921 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ComponentAllocationErrorItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ComponentAllocationErrorItem.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ComponentAllocationErrorItem type.
  */
-public class ComponentAllocationErrorItem {
+public class ComponentAllocationErrorItem
+        extends BaseModel {
     private Integer componentId;
     private String message;
     private String kind;
@@ -126,7 +128,8 @@ public void setOn(String on) {
     @Override
     public String toString() {
         return "ComponentAllocationErrorItem [" + "componentId=" + componentId + ", message="
-                + message + ", kind=" + kind + ", on=" + on + "]";
+                + message + ", kind=" + kind + ", on=" + on + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ComponentCostData.java b/src/main/java/com/maxio/advancedbilling/models/ComponentCostData.java
index 05b7cced..9dd1cb5e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ComponentCostData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ComponentCostData.java
@@ -10,13 +10,15 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.util.List;
 
 /**
  * This is a model class for ComponentCostData type.
  */
-public class ComponentCostData {
+public class ComponentCostData
+        extends BaseModel {
     private OptionalNullable<Integer> componentCodeId;
     private Integer pricePointId;
     private Integer productId;
@@ -244,7 +246,8 @@ public void setTiers(List<ComponentCostDataRateTier> tiers) {
     public String toString() {
         return "ComponentCostData [" + "componentCodeId=" + componentCodeId + ", pricePointId="
                 + pricePointId + ", productId=" + productId + ", quantity=" + quantity + ", amount="
-                + amount + ", pricingScheme=" + pricingScheme + ", tiers=" + tiers + "]";
+                + amount + ", pricingScheme=" + pricingScheme + ", tiers=" + tiers
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ComponentCostDataRateTier.java b/src/main/java/com/maxio/advancedbilling/models/ComponentCostDataRateTier.java
index f4a18d2b..ee0f1f98 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ComponentCostDataRateTier.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ComponentCostDataRateTier.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for ComponentCostDataRateTier type.
  */
-public class ComponentCostDataRateTier {
+public class ComponentCostDataRateTier
+        extends BaseModel {
     private Integer startingQuantity;
     private OptionalNullable<Integer> endingQuantity;
     private String quantity;
@@ -187,7 +189,8 @@ public void setAmount(String amount) {
     public String toString() {
         return "ComponentCostDataRateTier [" + "startingQuantity=" + startingQuantity
                 + ", endingQuantity=" + endingQuantity + ", quantity=" + quantity + ", unitPrice="
-                + unitPrice + ", amount=" + amount + "]";
+                + unitPrice + ", amount=" + amount + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ComponentCurrencyPrice.java b/src/main/java/com/maxio/advancedbilling/models/ComponentCurrencyPrice.java
index 5ee95b19..37d4ba89 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ComponentCurrencyPrice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ComponentCurrencyPrice.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ComponentCurrencyPrice type.
  */
-public class ComponentCurrencyPrice {
+public class ComponentCurrencyPrice
+        extends BaseModel {
     private Integer id;
     private String currency;
     private String price;
@@ -173,7 +175,8 @@ public void setPricePointId(Integer pricePointId) {
     public String toString() {
         return "ComponentCurrencyPrice [" + "id=" + id + ", currency=" + currency + ", price="
                 + price + ", formattedPrice=" + formattedPrice + ", priceId=" + priceId
-                + ", pricePointId=" + pricePointId + "]";
+                + ", pricePointId=" + pricePointId + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ComponentCurrencyPricesResponse.java b/src/main/java/com/maxio/advancedbilling/models/ComponentCurrencyPricesResponse.java
index 80e771fb..712c7084 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ComponentCurrencyPricesResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ComponentCurrencyPricesResponse.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ComponentCurrencyPricesResponse type.
  */
-public class ComponentCurrencyPricesResponse {
+public class ComponentCurrencyPricesResponse
+        extends BaseModel {
     private List<ComponentCurrencyPrice> currencyPrices;
 
     /**
@@ -55,7 +57,8 @@ public void setCurrencyPrices(List<ComponentCurrencyPrice> currencyPrices) {
      */
     @Override
     public String toString() {
-        return "ComponentCurrencyPricesResponse [" + "currencyPrices=" + currencyPrices + "]";
+        return "ComponentCurrencyPricesResponse [" + "currencyPrices=" + currencyPrices
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ComponentCustomPrice.java b/src/main/java/com/maxio/advancedbilling/models/ComponentCustomPrice.java
index 7e5ece39..3b192c65 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ComponentCustomPrice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ComponentCustomPrice.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ComponentCustomPrice type.
  */
-public class ComponentCustomPrice {
+public class ComponentCustomPrice
+        extends BaseModel {
     private PricingScheme pricingScheme;
     private Integer interval;
     private IntervalUnit intervalUnit;
@@ -141,7 +143,8 @@ public void setPrices(List<Price> prices) {
     @Override
     public String toString() {
         return "ComponentCustomPrice [" + "pricingScheme=" + pricingScheme + ", interval="
-                + interval + ", intervalUnit=" + intervalUnit + ", prices=" + prices + "]";
+                + interval + ", intervalUnit=" + intervalUnit + ", prices=" + prices
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ComponentPrice.java b/src/main/java/com/maxio/advancedbilling/models/ComponentPrice.java
index 55c8bd90..f2e45f71 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ComponentPrice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ComponentPrice.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for ComponentPrice type.
  */
-public class ComponentPrice {
+public class ComponentPrice
+        extends BaseModel {
     private Integer id;
     private Integer componentId;
     private Integer startingQuantity;
@@ -279,7 +281,8 @@ public String toString() {
         return "ComponentPrice [" + "id=" + id + ", componentId=" + componentId
                 + ", startingQuantity=" + startingQuantity + ", endingQuantity=" + endingQuantity
                 + ", unitPrice=" + unitPrice + ", pricePointId=" + pricePointId
-                + ", formattedUnitPrice=" + formattedUnitPrice + ", segmentId=" + segmentId + "]";
+                + ", formattedUnitPrice=" + formattedUnitPrice + ", segmentId=" + segmentId
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ComponentPricePoint.java b/src/main/java/com/maxio/advancedbilling/models/ComponentPricePoint.java
index bb76ecf3..f36dedde 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ComponentPricePoint.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ComponentPricePoint.java
@@ -13,6 +13,7 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
 import com.maxio.advancedbilling.models.containers.ComponentPricePointIntervalUnit;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 import java.util.List;
@@ -20,7 +21,8 @@
 /**
  * This is a model class for ComponentPricePoint type.
  */
-public class ComponentPricePoint {
+public class ComponentPricePoint
+        extends BaseModel {
     private Integer id;
     private PricePointType type;
     private Boolean mDefault;
@@ -589,7 +591,8 @@ public String toString() {
                 + createdAt + ", updatedAt=" + updatedAt + ", prices=" + prices
                 + ", useSiteExchangeRate=" + useSiteExchangeRate + ", subscriptionId="
                 + subscriptionId + ", taxIncluded=" + taxIncluded + ", interval=" + interval
-                + ", intervalUnit=" + intervalUnit + ", currencyPrices=" + currencyPrices + "]";
+                + ", intervalUnit=" + intervalUnit + ", currencyPrices=" + currencyPrices
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ComponentPricePointErrorItem.java b/src/main/java/com/maxio/advancedbilling/models/ComponentPricePointErrorItem.java
index 34cdc26c..c120a64f 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ComponentPricePointErrorItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ComponentPricePointErrorItem.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ComponentPricePointErrorItem type.
  */
-public class ComponentPricePointErrorItem {
+public class ComponentPricePointErrorItem
+        extends BaseModel {
     private Integer componentId;
     private String message;
     private Integer pricePoint;
@@ -103,7 +105,8 @@ public void setPricePoint(Integer pricePoint) {
     @Override
     public String toString() {
         return "ComponentPricePointErrorItem [" + "componentId=" + componentId + ", message="
-                + message + ", pricePoint=" + pricePoint + "]";
+                + message + ", pricePoint=" + pricePoint + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ComponentPricePointItem.java b/src/main/java/com/maxio/advancedbilling/models/ComponentPricePointItem.java
index 18fe73ca..8c1d7608 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ComponentPricePointItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ComponentPricePointItem.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ComponentPricePointItem type.
  */
-public class ComponentPricePointItem {
+public class ComponentPricePointItem
+        extends BaseModel {
     private String name;
     private String handle;
     private PricingScheme pricingScheme;
@@ -190,7 +192,8 @@ public void setPrices(List<Price> prices) {
     public String toString() {
         return "ComponentPricePointItem [" + "name=" + name + ", handle=" + handle
                 + ", pricingScheme=" + pricingScheme + ", interval=" + interval + ", intervalUnit="
-                + intervalUnit + ", prices=" + prices + "]";
+                + intervalUnit + ", prices=" + prices + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ComponentPricePointResponse.java b/src/main/java/com/maxio/advancedbilling/models/ComponentPricePointResponse.java
index 7cab0fad..dda17898 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ComponentPricePointResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ComponentPricePointResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ComponentPricePointResponse type.
  */
-public class ComponentPricePointResponse {
+public class ComponentPricePointResponse
+        extends BaseModel {
     private ComponentPricePoint pricePoint;
 
     /**
@@ -54,7 +56,8 @@ public void setPricePoint(ComponentPricePoint pricePoint) {
      */
     @Override
     public String toString() {
-        return "ComponentPricePointResponse [" + "pricePoint=" + pricePoint + "]";
+        return "ComponentPricePointResponse [" + "pricePoint=" + pricePoint
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ComponentPricePointsResponse.java b/src/main/java/com/maxio/advancedbilling/models/ComponentPricePointsResponse.java
index c0f8ed0e..9d90f45c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ComponentPricePointsResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ComponentPricePointsResponse.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ComponentPricePointsResponse type.
  */
-public class ComponentPricePointsResponse {
+public class ComponentPricePointsResponse
+        extends BaseModel {
     private List<ComponentPricePoint> pricePoints;
     private ListPublicKeysMeta meta;
 
@@ -81,7 +83,7 @@ public void setMeta(ListPublicKeysMeta meta) {
     @Override
     public String toString() {
         return "ComponentPricePointsResponse [" + "pricePoints=" + pricePoints + ", meta=" + meta
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ComponentResponse.java b/src/main/java/com/maxio/advancedbilling/models/ComponentResponse.java
index da3f9ba0..1aedbd17 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ComponentResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ComponentResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ComponentResponse type.
  */
-public class ComponentResponse {
+public class ComponentResponse
+        extends BaseModel {
     private Component component;
 
     /**
@@ -54,7 +56,8 @@ public void setComponent(Component component) {
      */
     @Override
     public String toString() {
-        return "ComponentResponse [" + "component=" + component + "]";
+        return "ComponentResponse [" + "component=" + component + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ComponentSPricePointAssignment.java b/src/main/java/com/maxio/advancedbilling/models/ComponentSPricePointAssignment.java
index 54f663da..b0e1122e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ComponentSPricePointAssignment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ComponentSPricePointAssignment.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.ComponentSPricePointAssignmentPricePoint;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ComponentSPricePointAssignment type.
  */
-public class ComponentSPricePointAssignment {
+public class ComponentSPricePointAssignment
+        extends BaseModel {
     private Integer componentId;
     private ComponentSPricePointAssignmentPricePoint pricePoint;
 
@@ -81,7 +83,7 @@ public void setPricePoint(ComponentSPricePointAssignmentPricePoint pricePoint) {
     @Override
     public String toString() {
         return "ComponentSPricePointAssignment [" + "componentId=" + componentId + ", pricePoint="
-                + pricePoint + "]";
+                + pricePoint + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ConsolidatedInvoice.java b/src/main/java/com/maxio/advancedbilling/models/ConsolidatedInvoice.java
index 37aaad38..071ac77f 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ConsolidatedInvoice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ConsolidatedInvoice.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ConsolidatedInvoice type.
  */
-public class ConsolidatedInvoice {
+public class ConsolidatedInvoice
+        extends BaseModel {
     private List<Invoice> invoices;
 
     /**
@@ -57,7 +59,8 @@ public void setInvoices(List<Invoice> invoices) {
      */
     @Override
     public String toString() {
-        return "ConsolidatedInvoice [" + "invoices=" + invoices + "]";
+        return "ConsolidatedInvoice [" + "invoices=" + invoices + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CountResponse.java b/src/main/java/com/maxio/advancedbilling/models/CountResponse.java
index 573ab7db..ecb14fe9 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CountResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CountResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CountResponse type.
  */
-public class CountResponse {
+public class CountResponse
+        extends BaseModel {
     private Integer count;
 
     /**
@@ -56,7 +58,8 @@ public void setCount(Integer count) {
      */
     @Override
     public String toString() {
-        return "CountResponse [" + "count=" + count + "]";
+        return "CountResponse [" + "count=" + count + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Coupon.java b/src/main/java/com/maxio/advancedbilling/models/Coupon.java
index 1d02c94a..7d9e253c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Coupon.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Coupon.java
@@ -13,6 +13,7 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
 import com.maxio.advancedbilling.models.containers.CouponCompoundingStrategy;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 import java.util.List;
@@ -20,7 +21,8 @@
 /**
  * This is a model class for Coupon type.
  */
-public class Coupon {
+public class Coupon
+        extends BaseModel {
     private Integer id;
     private String name;
     private String code;
@@ -983,7 +985,8 @@ public String toString() {
                 + useSiteExchangeRate + ", createdAt=" + createdAt + ", updatedAt=" + updatedAt
                 + ", discountType=" + discountType + ", excludeMidPeriodAllocations="
                 + excludeMidPeriodAllocations + ", applyOnCancelAtEndOfPeriod="
-                + applyOnCancelAtEndOfPeriod + ", couponRestrictions=" + couponRestrictions + "]";
+                + applyOnCancelAtEndOfPeriod + ", couponRestrictions=" + couponRestrictions
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CouponCurrency.java b/src/main/java/com/maxio/advancedbilling/models/CouponCurrency.java
index a105dfe7..d8435d07 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CouponCurrency.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CouponCurrency.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CouponCurrency type.
  */
-public class CouponCurrency {
+public class CouponCurrency
+        extends BaseModel {
     private Integer id;
     private String currency;
     private Integer price;
@@ -126,7 +128,8 @@ public void setCouponId(Integer couponId) {
     @Override
     public String toString() {
         return "CouponCurrency [" + "id=" + id + ", currency=" + currency + ", price=" + price
-                + ", couponId=" + couponId + "]";
+                + ", couponId=" + couponId + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CouponCurrencyRequest.java b/src/main/java/com/maxio/advancedbilling/models/CouponCurrencyRequest.java
index ceed7332..bba58c54 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CouponCurrencyRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CouponCurrencyRequest.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CouponCurrencyRequest type.
  */
-public class CouponCurrencyRequest {
+public class CouponCurrencyRequest
+        extends BaseModel {
     private List<UpdateCouponCurrency> currencyPrices;
 
     /**
@@ -55,7 +57,8 @@ public void setCurrencyPrices(List<UpdateCouponCurrency> currencyPrices) {
      */
     @Override
     public String toString() {
-        return "CouponCurrencyRequest [" + "currencyPrices=" + currencyPrices + "]";
+        return "CouponCurrencyRequest [" + "currencyPrices=" + currencyPrices
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CouponCurrencyResponse.java b/src/main/java/com/maxio/advancedbilling/models/CouponCurrencyResponse.java
index ab7451fe..6d917ef1 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CouponCurrencyResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CouponCurrencyResponse.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CouponCurrencyResponse type.
  */
-public class CouponCurrencyResponse {
+public class CouponCurrencyResponse
+        extends BaseModel {
     private List<CouponCurrency> currencyPrices;
 
     /**
@@ -57,7 +59,8 @@ public void setCurrencyPrices(List<CouponCurrency> currencyPrices) {
      */
     @Override
     public String toString() {
-        return "CouponCurrencyResponse [" + "currencyPrices=" + currencyPrices + "]";
+        return "CouponCurrencyResponse [" + "currencyPrices=" + currencyPrices
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CouponResponse.java b/src/main/java/com/maxio/advancedbilling/models/CouponResponse.java
index 6d78ea55..aa335753 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CouponResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CouponResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CouponResponse type.
  */
-public class CouponResponse {
+public class CouponResponse
+        extends BaseModel {
     private Coupon coupon;
 
     /**
@@ -56,7 +58,8 @@ public void setCoupon(Coupon coupon) {
      */
     @Override
     public String toString() {
-        return "CouponResponse [" + "coupon=" + coupon + "]";
+        return "CouponResponse [" + "coupon=" + coupon + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CouponRestriction.java b/src/main/java/com/maxio/advancedbilling/models/CouponRestriction.java
index 46c5a906..688c8177 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CouponRestriction.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CouponRestriction.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for CouponRestriction type.
  */
-public class CouponRestriction {
+public class CouponRestriction
+        extends BaseModel {
     private Integer id;
     private RestrictionType itemType;
     private Integer itemId;
@@ -185,7 +187,8 @@ public void unsetHandle() {
     @Override
     public String toString() {
         return "CouponRestriction [" + "id=" + id + ", itemType=" + itemType + ", itemId=" + itemId
-                + ", name=" + name + ", handle=" + handle + "]";
+                + ", name=" + name + ", handle=" + handle + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CouponSubcodes.java b/src/main/java/com/maxio/advancedbilling/models/CouponSubcodes.java
index ed022524..892edb09 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CouponSubcodes.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CouponSubcodes.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CouponSubcodes type.
  */
-public class CouponSubcodes {
+public class CouponSubcodes
+        extends BaseModel {
     private List<String> codes;
 
     /**
@@ -57,7 +59,8 @@ public void setCodes(List<String> codes) {
      */
     @Override
     public String toString() {
-        return "CouponSubcodes [" + "codes=" + codes + "]";
+        return "CouponSubcodes [" + "codes=" + codes + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CouponSubcodesResponse.java b/src/main/java/com/maxio/advancedbilling/models/CouponSubcodesResponse.java
index d411663c..b2ab9581 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CouponSubcodesResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CouponSubcodesResponse.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CouponSubcodesResponse type.
  */
-public class CouponSubcodesResponse {
+public class CouponSubcodesResponse
+        extends BaseModel {
     private List<String> createdCodes;
     private List<String> duplicateCodes;
     private List<String> invalidCodes;
@@ -104,7 +106,8 @@ public void setInvalidCodes(List<String> invalidCodes) {
     @Override
     public String toString() {
         return "CouponSubcodesResponse [" + "createdCodes=" + createdCodes + ", duplicateCodes="
-                + duplicateCodes + ", invalidCodes=" + invalidCodes + "]";
+                + duplicateCodes + ", invalidCodes=" + invalidCodes + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CouponUsage.java b/src/main/java/com/maxio/advancedbilling/models/CouponUsage.java
index 0c872be4..625b1841 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CouponUsage.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CouponUsage.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for CouponUsage type.
  */
-public class CouponUsage {
+public class CouponUsage
+        extends BaseModel {
     private Integer id;
     private String name;
     private Integer signups;
@@ -289,7 +291,8 @@ public void setRevenueInCents(Long revenueInCents) {
     public String toString() {
         return "CouponUsage [" + "id=" + id + ", name=" + name + ", signups=" + signups
                 + ", savings=" + savings + ", savingsInCents=" + savingsInCents + ", revenue="
-                + revenue + ", revenueInCents=" + revenueInCents + "]";
+                + revenue + ", revenueInCents=" + revenueInCents + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateAllocation.java b/src/main/java/com/maxio/advancedbilling/models/CreateAllocation.java
index 27fd6ac7..54c6891e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateAllocation.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateAllocation.java
@@ -11,12 +11,14 @@
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.models.containers.CreateAllocationPricePointId;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for CreateAllocation type.
  */
-public class CreateAllocation {
+public class CreateAllocation
+        extends BaseModel {
     private double quantity;
     private Integer componentId;
     private String memo;
@@ -437,7 +439,8 @@ public String toString() {
                 + ", prorationUpgradeScheme=" + prorationUpgradeScheme + ", accrueCharge="
                 + accrueCharge + ", downgradeCredit=" + downgradeCredit + ", upgradeCharge="
                 + upgradeCharge + ", initiateDunning=" + initiateDunning + ", pricePointId="
-                + pricePointId + ", billingSchedule=" + billingSchedule + "]";
+                + pricePointId + ", billingSchedule=" + billingSchedule + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateAllocationRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateAllocationRequest.java
index f0a87bfb..cd02a126 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateAllocationRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateAllocationRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateAllocationRequest type.
  */
-public class CreateAllocationRequest {
+public class CreateAllocationRequest
+        extends BaseModel {
     private CreateAllocation allocation;
 
     /**
@@ -54,7 +56,8 @@ public void setAllocation(CreateAllocation allocation) {
      */
     @Override
     public String toString() {
-        return "CreateAllocationRequest [" + "allocation=" + allocation + "]";
+        return "CreateAllocationRequest [" + "allocation=" + allocation + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateComponentPricePoint.java b/src/main/java/com/maxio/advancedbilling/models/CreateComponentPricePoint.java
index b2e1c8a7..c67226b6 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateComponentPricePoint.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateComponentPricePoint.java
@@ -11,12 +11,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CreateComponentPricePoint type.
  */
-public class CreateComponentPricePoint {
+public class CreateComponentPricePoint
+        extends BaseModel {
     private String name;
     private String handle;
     private PricingScheme pricingScheme;
@@ -257,7 +259,8 @@ public String toString() {
         return "CreateComponentPricePoint [" + "name=" + name + ", pricingScheme=" + pricingScheme
                 + ", prices=" + prices + ", handle=" + handle + ", useSiteExchangeRate="
                 + useSiteExchangeRate + ", taxIncluded=" + taxIncluded + ", interval=" + interval
-                + ", intervalUnit=" + intervalUnit + "]";
+                + ", intervalUnit=" + intervalUnit + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateComponentPricePointRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateComponentPricePointRequest.java
index 28090696..c35cbefd 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateComponentPricePointRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateComponentPricePointRequest.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.CreateComponentPricePointRequestPricePoint;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateComponentPricePointRequest type.
  */
-public class CreateComponentPricePointRequest {
+public class CreateComponentPricePointRequest
+        extends BaseModel {
     private CreateComponentPricePointRequestPricePoint pricePoint;
 
     /**
@@ -55,7 +57,8 @@ public void setPricePoint(CreateComponentPricePointRequestPricePoint pricePoint)
      */
     @Override
     public String toString() {
-        return "CreateComponentPricePointRequest [" + "pricePoint=" + pricePoint + "]";
+        return "CreateComponentPricePointRequest [" + "pricePoint=" + pricePoint
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateComponentPricePointsRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateComponentPricePointsRequest.java
index 53d06794..5f4a85a5 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateComponentPricePointsRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateComponentPricePointsRequest.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.CreateComponentPricePointsRequestPricePoints;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CreateComponentPricePointsRequest type.
  */
-public class CreateComponentPricePointsRequest {
+public class CreateComponentPricePointsRequest
+        extends BaseModel {
     private List<CreateComponentPricePointsRequestPricePoints> pricePoints;
 
     /**
@@ -57,7 +59,8 @@ public void setPricePoints(List<CreateComponentPricePointsRequestPricePoints> pr
      */
     @Override
     public String toString() {
-        return "CreateComponentPricePointsRequest [" + "pricePoints=" + pricePoints + "]";
+        return "CreateComponentPricePointsRequest [" + "pricePoints=" + pricePoints
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateCurrencyPrice.java b/src/main/java/com/maxio/advancedbilling/models/CreateCurrencyPrice.java
index 096f5b03..28d35596 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateCurrencyPrice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateCurrencyPrice.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateCurrencyPrice type.
  */
-public class CreateCurrencyPrice {
+public class CreateCurrencyPrice
+        extends BaseModel {
     private String currency;
     private Double price;
     private Integer priceId;
@@ -109,7 +111,7 @@ public void setPriceId(Integer priceId) {
     @Override
     public String toString() {
         return "CreateCurrencyPrice [" + "currency=" + currency + ", price=" + price + ", priceId="
-                + priceId + "]";
+                + priceId + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateCurrencyPricesRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateCurrencyPricesRequest.java
index 7623dc1e..5316f31d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateCurrencyPricesRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateCurrencyPricesRequest.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CreateCurrencyPricesRequest type.
  */
-public class CreateCurrencyPricesRequest {
+public class CreateCurrencyPricesRequest
+        extends BaseModel {
     private List<CreateCurrencyPrice> currencyPrices;
 
     /**
@@ -55,7 +57,8 @@ public void setCurrencyPrices(List<CreateCurrencyPrice> currencyPrices) {
      */
     @Override
     public String toString() {
-        return "CreateCurrencyPricesRequest [" + "currencyPrices=" + currencyPrices + "]";
+        return "CreateCurrencyPricesRequest [" + "currencyPrices=" + currencyPrices
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateCustomer.java b/src/main/java/com/maxio/advancedbilling/models/CreateCustomer.java
index 0756b514..e6fc41db 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateCustomer.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateCustomer.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for CreateCustomer type.
  */
-public class CreateCustomer {
+public class CreateCustomer
+        extends BaseModel {
     private String firstName;
     private String lastName;
     private String email;
@@ -520,7 +522,8 @@ public String toString() {
                 + ", city=" + city + ", state=" + state + ", zip=" + zip + ", country=" + country
                 + ", phone=" + phone + ", locale=" + locale + ", vatNumber=" + vatNumber
                 + ", taxExempt=" + taxExempt + ", taxExemptReason=" + taxExemptReason
-                + ", parentId=" + parentId + "]";
+                + ", parentId=" + parentId + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateCustomerRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateCustomerRequest.java
index be2303ec..a0f1ae13 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateCustomerRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateCustomerRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateCustomerRequest type.
  */
-public class CreateCustomerRequest {
+public class CreateCustomerRequest
+        extends BaseModel {
     private CreateCustomer customer;
 
     /**
@@ -54,7 +56,8 @@ public void setCustomer(CreateCustomer customer) {
      */
     @Override
     public String toString() {
-        return "CreateCustomerRequest [" + "customer=" + customer + "]";
+        return "CreateCustomerRequest [" + "customer=" + customer + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateEBBComponent.java b/src/main/java/com/maxio/advancedbilling/models/CreateEBBComponent.java
index 4c00f819..14f09548 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateEBBComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateEBBComponent.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateEBBComponent type.
  */
-public class CreateEBBComponent {
+public class CreateEBBComponent
+        extends BaseModel {
     private EBBComponent eventBasedComponent;
 
     /**
@@ -54,7 +56,8 @@ public void setEventBasedComponent(EBBComponent eventBasedComponent) {
      */
     @Override
     public String toString() {
-        return "CreateEBBComponent [" + "eventBasedComponent=" + eventBasedComponent + "]";
+        return "CreateEBBComponent [" + "eventBasedComponent=" + eventBasedComponent
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateInvoice.java b/src/main/java/com/maxio/advancedbilling/models/CreateInvoice.java
index 698d50fa..48a6b660 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateInvoice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateInvoice.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.LocalDate;
 import java.util.List;
 
 /**
  * This is a model class for CreateInvoice type.
  */
-public class CreateInvoice {
+public class CreateInvoice
+        extends BaseModel {
     private List<CreateInvoiceItem> lineItems;
     private LocalDate issueDate;
     private Integer netTerms;
@@ -289,7 +291,8 @@ public String toString() {
                 + ", netTerms=" + netTerms + ", paymentInstructions=" + paymentInstructions
                 + ", memo=" + memo + ", sellerAddress=" + sellerAddress + ", billingAddress="
                 + billingAddress + ", shippingAddress=" + shippingAddress + ", coupons=" + coupons
-                + ", status=" + status + "]";
+                + ", status=" + status + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateInvoiceAddress.java b/src/main/java/com/maxio/advancedbilling/models/CreateInvoiceAddress.java
index 607cfc2a..2adb67d4 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateInvoiceAddress.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateInvoiceAddress.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateInvoiceAddress type.
  */
-public class CreateInvoiceAddress {
+public class CreateInvoiceAddress
+        extends BaseModel {
     private String firstName;
     private String lastName;
     private String phone;
@@ -242,7 +244,8 @@ public void setCountry(String country) {
     public String toString() {
         return "CreateInvoiceAddress [" + "firstName=" + firstName + ", lastName=" + lastName
                 + ", phone=" + phone + ", address=" + address + ", address2=" + address2 + ", city="
-                + city + ", state=" + state + ", zip=" + zip + ", country=" + country + "]";
+                + city + ", state=" + state + ", zip=" + zip + ", country=" + country
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateInvoiceCoupon.java b/src/main/java/com/maxio/advancedbilling/models/CreateInvoiceCoupon.java
index 5aa4561d..a13e1baa 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateInvoiceCoupon.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateInvoiceCoupon.java
@@ -12,11 +12,13 @@
 import com.maxio.advancedbilling.models.containers.CreateInvoiceCouponAmount;
 import com.maxio.advancedbilling.models.containers.CreateInvoiceCouponPercentage;
 import com.maxio.advancedbilling.models.containers.CreateInvoiceCouponProductFamilyId;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateInvoiceCoupon type.
  */
-public class CreateInvoiceCoupon {
+public class CreateInvoiceCoupon
+        extends BaseModel {
     private String code;
     private CreateInvoiceCouponPercentage percentage;
     private CreateInvoiceCouponAmount amount;
@@ -176,7 +178,8 @@ public void setCompoundingStrategy(CompoundingStrategy compoundingStrategy) {
     public String toString() {
         return "CreateInvoiceCoupon [" + "code=" + code + ", percentage=" + percentage + ", amount="
                 + amount + ", description=" + description + ", productFamilyId=" + productFamilyId
-                + ", compoundingStrategy=" + compoundingStrategy + "]";
+                + ", compoundingStrategy=" + compoundingStrategy + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateInvoiceItem.java b/src/main/java/com/maxio/advancedbilling/models/CreateInvoiceItem.java
index c68b9ad8..b74cac34 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateInvoiceItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateInvoiceItem.java
@@ -15,11 +15,13 @@
 import com.maxio.advancedbilling.models.containers.CreateInvoiceItemProductPricePointId;
 import com.maxio.advancedbilling.models.containers.CreateInvoiceItemQuantity;
 import com.maxio.advancedbilling.models.containers.CreateInvoiceItemUnitPrice;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateInvoiceItem type.
  */
-public class CreateInvoiceItem {
+public class CreateInvoiceItem
+        extends BaseModel {
     private String title;
     private CreateInvoiceItemQuantity quantity;
     private CreateInvoiceItemUnitPrice unitPrice;
@@ -347,7 +349,7 @@ public String toString() {
                 + ", periodRangeStart=" + periodRangeStart + ", periodRangeEnd=" + periodRangeEnd
                 + ", productId=" + productId + ", componentId=" + componentId + ", pricePointId="
                 + pricePointId + ", productPricePointId=" + productPricePointId + ", description="
-                + description + "]";
+                + description + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateInvoicePayment.java b/src/main/java/com/maxio/advancedbilling/models/CreateInvoicePayment.java
index 90afadb0..318902fc 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateInvoicePayment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateInvoicePayment.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.CreateInvoicePaymentAmount;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateInvoicePayment type.
  */
-public class CreateInvoicePayment {
+public class CreateInvoicePayment
+        extends BaseModel {
     private CreateInvoicePaymentAmount amount;
     private String memo;
     private InvoicePaymentMethodType method;
@@ -160,7 +162,8 @@ public void setPaymentProfileId(Integer paymentProfileId) {
     @Override
     public String toString() {
         return "CreateInvoicePayment [" + "amount=" + amount + ", memo=" + memo + ", method="
-                + method + ", details=" + details + ", paymentProfileId=" + paymentProfileId + "]";
+                + method + ", details=" + details + ", paymentProfileId=" + paymentProfileId
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateInvoicePaymentApplication.java b/src/main/java/com/maxio/advancedbilling/models/CreateInvoicePaymentApplication.java
index f8f2cbff..aac8eb33 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateInvoicePaymentApplication.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateInvoicePaymentApplication.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateInvoicePaymentApplication type.
  */
-public class CreateInvoicePaymentApplication {
+public class CreateInvoicePaymentApplication
+        extends BaseModel {
     private String invoiceUid;
     private String amount;
 
@@ -83,7 +85,7 @@ public void setAmount(String amount) {
     @Override
     public String toString() {
         return "CreateInvoicePaymentApplication [" + "invoiceUid=" + invoiceUid + ", amount="
-                + amount + "]";
+                + amount + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateInvoicePaymentRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateInvoicePaymentRequest.java
index abe281e1..341cf897 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateInvoicePaymentRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateInvoicePaymentRequest.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateInvoicePaymentRequest type.
  */
-public class CreateInvoicePaymentRequest {
+public class CreateInvoicePaymentRequest
+        extends BaseModel {
     private CreateInvoicePayment payment;
     private InvoicePaymentType type;
 
@@ -80,7 +82,8 @@ public void setType(InvoicePaymentType type) {
      */
     @Override
     public String toString() {
-        return "CreateInvoicePaymentRequest [" + "payment=" + payment + ", type=" + type + "]";
+        return "CreateInvoicePaymentRequest [" + "payment=" + payment + ", type=" + type
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateInvoiceRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateInvoiceRequest.java
index 2b4d5c14..29904893 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateInvoiceRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateInvoiceRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateInvoiceRequest type.
  */
-public class CreateInvoiceRequest {
+public class CreateInvoiceRequest
+        extends BaseModel {
     private CreateInvoice invoice;
 
     /**
@@ -54,7 +56,8 @@ public void setInvoice(CreateInvoice invoice) {
      */
     @Override
     public String toString() {
-        return "CreateInvoiceRequest [" + "invoice=" + invoice + "]";
+        return "CreateInvoiceRequest [" + "invoice=" + invoice + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateMetadata.java b/src/main/java/com/maxio/advancedbilling/models/CreateMetadata.java
index 5578dc29..a3316a43 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateMetadata.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateMetadata.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateMetadata type.
  */
-public class CreateMetadata {
+public class CreateMetadata
+        extends BaseModel {
     private String name;
     private String value;
 
@@ -79,7 +81,8 @@ public void setValue(String value) {
      */
     @Override
     public String toString() {
-        return "CreateMetadata [" + "name=" + name + ", value=" + value + "]";
+        return "CreateMetadata [" + "name=" + name + ", value=" + value + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateMetadataRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateMetadataRequest.java
index d95d18c2..a362cb07 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateMetadataRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateMetadataRequest.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CreateMetadataRequest type.
  */
-public class CreateMetadataRequest {
+public class CreateMetadataRequest
+        extends BaseModel {
     private List<CreateMetadata> metadata;
 
     /**
@@ -55,7 +57,8 @@ public void setMetadata(List<CreateMetadata> metadata) {
      */
     @Override
     public String toString() {
-        return "CreateMetadataRequest [" + "metadata=" + metadata + "]";
+        return "CreateMetadataRequest [" + "metadata=" + metadata + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateMetafield.java b/src/main/java/com/maxio/advancedbilling/models/CreateMetafield.java
index dd0482fc..6f21cd7d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateMetafield.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateMetafield.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CreateMetafield type.
  */
-public class CreateMetafield {
+public class CreateMetafield
+        extends BaseModel {
     private String name;
     private MetafieldScope scope;
     private MetafieldInput inputType;
@@ -141,7 +143,8 @@ public void setEnum(List<String> mEnum) {
     @Override
     public String toString() {
         return "CreateMetafield [" + "name=" + name + ", scope=" + scope + ", inputType="
-                + inputType + ", mEnum=" + mEnum + "]";
+                + inputType + ", mEnum=" + mEnum + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateMetafieldsRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateMetafieldsRequest.java
index 05d11e78..5a3354f4 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateMetafieldsRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateMetafieldsRequest.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.CreateMetafieldsRequestMetafields;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateMetafieldsRequest type.
  */
-public class CreateMetafieldsRequest {
+public class CreateMetafieldsRequest
+        extends BaseModel {
     private CreateMetafieldsRequestMetafields metafields;
 
     /**
@@ -55,7 +57,8 @@ public void setMetafields(CreateMetafieldsRequestMetafields metafields) {
      */
     @Override
     public String toString() {
-        return "CreateMetafieldsRequest [" + "metafields=" + metafields + "]";
+        return "CreateMetafieldsRequest [" + "metafields=" + metafields + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateMeteredComponent.java b/src/main/java/com/maxio/advancedbilling/models/CreateMeteredComponent.java
index af768800..8447e181 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateMeteredComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateMeteredComponent.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateMeteredComponent type.
  */
-public class CreateMeteredComponent {
+public class CreateMeteredComponent
+        extends BaseModel {
     private MeteredComponent meteredComponent;
 
     /**
@@ -54,7 +56,8 @@ public void setMeteredComponent(MeteredComponent meteredComponent) {
      */
     @Override
     public String toString() {
-        return "CreateMeteredComponent [" + "meteredComponent=" + meteredComponent + "]";
+        return "CreateMeteredComponent [" + "meteredComponent=" + meteredComponent
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateMultiInvoicePayment.java b/src/main/java/com/maxio/advancedbilling/models/CreateMultiInvoicePayment.java
index 7d73f556..01d8a774 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateMultiInvoicePayment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateMultiInvoicePayment.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.CreateMultiInvoicePaymentAmount;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CreateMultiInvoicePayment type.
  */
-public class CreateMultiInvoicePayment {
+public class CreateMultiInvoicePayment
+        extends BaseModel {
     private String memo;
     private String details;
     private InvoicePaymentMethodType method;
@@ -183,7 +185,7 @@ public void setApplications(List<CreateInvoicePaymentApplication> applications)
     public String toString() {
         return "CreateMultiInvoicePayment [" + "amount=" + amount + ", applications=" + applications
                 + ", memo=" + memo + ", details=" + details + ", method=" + method + ", receivedOn="
-                + receivedOn + "]";
+                + receivedOn + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateMultiInvoicePaymentRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateMultiInvoicePaymentRequest.java
index 253c33b7..aa3e90f4 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateMultiInvoicePaymentRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateMultiInvoicePaymentRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateMultiInvoicePaymentRequest type.
  */
-public class CreateMultiInvoicePaymentRequest {
+public class CreateMultiInvoicePaymentRequest
+        extends BaseModel {
     private CreateMultiInvoicePayment payment;
 
     /**
@@ -54,7 +56,8 @@ public void setPayment(CreateMultiInvoicePayment payment) {
      */
     @Override
     public String toString() {
-        return "CreateMultiInvoicePaymentRequest [" + "payment=" + payment + "]";
+        return "CreateMultiInvoicePaymentRequest [" + "payment=" + payment
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateOffer.java b/src/main/java/com/maxio/advancedbilling/models/CreateOffer.java
index 9f07afb7..d8a19694 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateOffer.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateOffer.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CreateOffer type.
  */
-public class CreateOffer {
+public class CreateOffer
+        extends BaseModel {
     private String name;
     private String handle;
     private String description;
@@ -194,7 +196,8 @@ public void setCoupons(List<String> coupons) {
     public String toString() {
         return "CreateOffer [" + "name=" + name + ", handle=" + handle + ", productId=" + productId
                 + ", description=" + description + ", productPricePointId=" + productPricePointId
-                + ", components=" + components + ", coupons=" + coupons + "]";
+                + ", components=" + components + ", coupons=" + coupons + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateOfferComponent.java b/src/main/java/com/maxio/advancedbilling/models/CreateOfferComponent.java
index 0442595c..829f72d7 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateOfferComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateOfferComponent.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateOfferComponent type.
  */
-public class CreateOfferComponent {
+public class CreateOfferComponent
+        extends BaseModel {
     private Integer componentId;
     private Integer startingQuantity;
 
@@ -80,7 +82,7 @@ public void setStartingQuantity(Integer startingQuantity) {
     @Override
     public String toString() {
         return "CreateOfferComponent [" + "componentId=" + componentId + ", startingQuantity="
-                + startingQuantity + "]";
+                + startingQuantity + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateOfferRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateOfferRequest.java
index 5a7e5460..d292d375 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateOfferRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateOfferRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateOfferRequest type.
  */
-public class CreateOfferRequest {
+public class CreateOfferRequest
+        extends BaseModel {
     private CreateOffer offer;
 
     /**
@@ -54,7 +56,8 @@ public void setOffer(CreateOffer offer) {
      */
     @Override
     public String toString() {
-        return "CreateOfferRequest [" + "offer=" + offer + "]";
+        return "CreateOfferRequest [" + "offer=" + offer + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateOnOffComponent.java b/src/main/java/com/maxio/advancedbilling/models/CreateOnOffComponent.java
index 1a6acef9..1640181d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateOnOffComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateOnOffComponent.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateOnOffComponent type.
  */
-public class CreateOnOffComponent {
+public class CreateOnOffComponent
+        extends BaseModel {
     private OnOffComponent onOffComponent;
 
     /**
@@ -54,7 +56,8 @@ public void setOnOffComponent(OnOffComponent onOffComponent) {
      */
     @Override
     public String toString() {
-        return "CreateOnOffComponent [" + "onOffComponent=" + onOffComponent + "]";
+        return "CreateOnOffComponent [" + "onOffComponent=" + onOffComponent
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateCoupon.java b/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateCoupon.java
index db946a6c..2545351a 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateCoupon.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateCoupon.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.CreateOrUpdateCouponCoupon;
+import io.apimatic.core.types.BaseModel;
 import java.util.Map;
 
 /**
  * This is a model class for CreateOrUpdateCoupon type.
  */
-public class CreateOrUpdateCoupon {
+public class CreateOrUpdateCoupon
+        extends BaseModel {
     private CreateOrUpdateCouponCoupon coupon;
     private Map<String, Boolean> restrictedProducts;
     private Map<String, Boolean> restrictedComponents;
@@ -113,7 +115,8 @@ public void setRestrictedComponents(Map<String, Boolean> restrictedComponents) {
     @Override
     public String toString() {
         return "CreateOrUpdateCoupon [" + "coupon=" + coupon + ", restrictedProducts="
-                + restrictedProducts + ", restrictedComponents=" + restrictedComponents + "]";
+                + restrictedProducts + ", restrictedComponents=" + restrictedComponents
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateEndpoint.java b/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateEndpoint.java
index 3f682ee0..51f11efe 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateEndpoint.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateEndpoint.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CreateOrUpdateEndpoint type.
  */
-public class CreateOrUpdateEndpoint {
+public class CreateOrUpdateEndpoint
+        extends BaseModel {
     private String url;
     private List<WebhookSubscription> webhookSubscriptions;
 
@@ -78,7 +80,8 @@ public void setWebhookSubscriptions(List<WebhookSubscription> webhookSubscriptio
     @Override
     public String toString() {
         return "CreateOrUpdateEndpoint [" + "url=" + url + ", webhookSubscriptions="
-                + webhookSubscriptions + "]";
+                + webhookSubscriptions + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateEndpointRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateEndpointRequest.java
index b530580e..7f9cb8f8 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateEndpointRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateEndpointRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateOrUpdateEndpointRequest type.
  */
-public class CreateOrUpdateEndpointRequest {
+public class CreateOrUpdateEndpointRequest
+        extends BaseModel {
     private CreateOrUpdateEndpoint endpoint;
 
     /**
@@ -56,7 +58,8 @@ public void setEndpoint(CreateOrUpdateEndpoint endpoint) {
      */
     @Override
     public String toString() {
-        return "CreateOrUpdateEndpointRequest [" + "endpoint=" + endpoint + "]";
+        return "CreateOrUpdateEndpointRequest [" + "endpoint=" + endpoint
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateFlatAmountCoupon.java b/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateFlatAmountCoupon.java
index 92937ca6..ddc64f5e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateFlatAmountCoupon.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateFlatAmountCoupon.java
@@ -14,12 +14,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for CreateOrUpdateFlatAmountCoupon type.
  */
-public class CreateOrUpdateFlatAmountCoupon {
+public class CreateOrUpdateFlatAmountCoupon
+        extends BaseModel {
     private String name;
     private String code;
     private String description;
@@ -340,7 +342,8 @@ public String toString() {
                 + ", endDate=" + endDate + ", productFamilyId=" + productFamilyId + ", stackable="
                 + stackable + ", compoundingStrategy=" + compoundingStrategy
                 + ", excludeMidPeriodAllocations=" + excludeMidPeriodAllocations
-                + ", applyOnCancelAtEndOfPeriod=" + applyOnCancelAtEndOfPeriod + "]";
+                + ", applyOnCancelAtEndOfPeriod=" + applyOnCancelAtEndOfPeriod
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdatePercentageCoupon.java b/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdatePercentageCoupon.java
index 97fccd18..d547d5f4 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdatePercentageCoupon.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdatePercentageCoupon.java
@@ -15,12 +15,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
 import com.maxio.advancedbilling.models.containers.CreateOrUpdatePercentageCouponPercentage;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for CreateOrUpdatePercentageCoupon type.
  */
-public class CreateOrUpdatePercentageCoupon {
+public class CreateOrUpdatePercentageCoupon
+        extends BaseModel {
     private String name;
     private String code;
     private String description;
@@ -341,7 +343,8 @@ public String toString() {
                 + ", endDate=" + endDate + ", productFamilyId=" + productFamilyId + ", stackable="
                 + stackable + ", compoundingStrategy=" + compoundingStrategy
                 + ", excludeMidPeriodAllocations=" + excludeMidPeriodAllocations
-                + ", applyOnCancelAtEndOfPeriod=" + applyOnCancelAtEndOfPeriod + "]";
+                + ", applyOnCancelAtEndOfPeriod=" + applyOnCancelAtEndOfPeriod
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateProduct.java b/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateProduct.java
index 382c913b..57a76bc2 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateProduct.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateProduct.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateOrUpdateProduct type.
  */
-public class CreateOrUpdateProduct {
+public class CreateOrUpdateProduct
+        extends BaseModel {
     private String name;
     private String handle;
     private String description;
@@ -443,7 +445,8 @@ public String toString() {
                 + trialPriceInCents + ", trialInterval=" + trialInterval + ", trialIntervalUnit="
                 + trialIntervalUnit + ", trialType=" + trialType + ", expirationInterval="
                 + expirationInterval + ", expirationIntervalUnit=" + expirationIntervalUnit
-                + ", autoCreateSignupPage=" + autoCreateSignupPage + ", taxCode=" + taxCode + "]";
+                + ", autoCreateSignupPage=" + autoCreateSignupPage + ", taxCode=" + taxCode
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateProductRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateProductRequest.java
index 1ee142cf..608d59bc 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateProductRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateProductRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateOrUpdateProductRequest type.
  */
-public class CreateOrUpdateProductRequest {
+public class CreateOrUpdateProductRequest
+        extends BaseModel {
     private CreateOrUpdateProduct product;
 
     /**
@@ -54,7 +56,8 @@ public void setProduct(CreateOrUpdateProduct product) {
      */
     @Override
     public String toString() {
-        return "CreateOrUpdateProductRequest [" + "product=" + product + "]";
+        return "CreateOrUpdateProductRequest [" + "product=" + product + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateSegmentPrice.java b/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateSegmentPrice.java
index 71906865..91385cfd 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateSegmentPrice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateOrUpdateSegmentPrice.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.CreateOrUpdateSegmentPriceUnitPrice;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateOrUpdateSegmentPrice type.
  */
-public class CreateOrUpdateSegmentPrice {
+public class CreateOrUpdateSegmentPrice
+        extends BaseModel {
     private Integer startingQuantity;
     private Integer endingQuantity;
     private CreateOrUpdateSegmentPriceUnitPrice unitPrice;
@@ -105,7 +107,8 @@ public void setUnitPrice(CreateOrUpdateSegmentPriceUnitPrice unitPrice) {
     @Override
     public String toString() {
         return "CreateOrUpdateSegmentPrice [" + "unitPrice=" + unitPrice + ", startingQuantity="
-                + startingQuantity + ", endingQuantity=" + endingQuantity + "]";
+                + startingQuantity + ", endingQuantity=" + endingQuantity
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreatePayment.java b/src/main/java/com/maxio/advancedbilling/models/CreatePayment.java
index 15540658..27c42d1f 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreatePayment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreatePayment.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreatePayment type.
  */
-public class CreatePayment {
+public class CreatePayment
+        extends BaseModel {
     private String amount;
     private String memo;
     private String paymentDetails;
@@ -123,7 +125,8 @@ public void setPaymentMethod(InvoicePaymentMethodType paymentMethod) {
     @Override
     public String toString() {
         return "CreatePayment [" + "amount=" + amount + ", memo=" + memo + ", paymentDetails="
-                + paymentDetails + ", paymentMethod=" + paymentMethod + "]";
+                + paymentDetails + ", paymentMethod=" + paymentMethod + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreatePaymentProfile.java b/src/main/java/com/maxio/advancedbilling/models/CreatePaymentProfile.java
index 4f8d2ce2..108f05c5 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreatePaymentProfile.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreatePaymentProfile.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.models.containers.CreatePaymentProfileExpirationMonth;
 import com.maxio.advancedbilling.models.containers.CreatePaymentProfileExpirationYear;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for CreatePaymentProfile type.
  */
-public class CreatePaymentProfile {
+public class CreatePaymentProfile
+        extends BaseModel {
     private String chargifyToken;
     private Integer id;
     private PaymentType paymentType;
@@ -1007,7 +1009,7 @@ public String toString() {
                 + bankRoutingNumber + ", bankAccountNumber=" + bankAccountNumber
                 + ", bankBranchCode=" + bankBranchCode + ", bankAccountType=" + bankAccountType
                 + ", bankAccountHolderType=" + bankAccountHolderType + ", lastFour=" + lastFour
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreatePaymentProfileRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreatePaymentProfileRequest.java
index 7396612f..cd0e20d9 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreatePaymentProfileRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreatePaymentProfileRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreatePaymentProfileRequest type.
  */
-public class CreatePaymentProfileRequest {
+public class CreatePaymentProfileRequest
+        extends BaseModel {
     private CreatePaymentProfile paymentProfile;
 
     /**
@@ -54,7 +56,8 @@ public void setPaymentProfile(CreatePaymentProfile paymentProfile) {
      */
     @Override
     public String toString() {
-        return "CreatePaymentProfileRequest [" + "paymentProfile=" + paymentProfile + "]";
+        return "CreatePaymentProfileRequest [" + "paymentProfile=" + paymentProfile
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreatePrepaidComponent.java b/src/main/java/com/maxio/advancedbilling/models/CreatePrepaidComponent.java
index 10162ff5..62c82c99 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreatePrepaidComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreatePrepaidComponent.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreatePrepaidComponent type.
  */
-public class CreatePrepaidComponent {
+public class CreatePrepaidComponent
+        extends BaseModel {
     private PrepaidUsageComponent prepaidUsageComponent;
 
     /**
@@ -54,7 +56,8 @@ public void setPrepaidUsageComponent(PrepaidUsageComponent prepaidUsageComponent
      */
     @Override
     public String toString() {
-        return "CreatePrepaidComponent [" + "prepaidUsageComponent=" + prepaidUsageComponent + "]";
+        return "CreatePrepaidComponent [" + "prepaidUsageComponent=" + prepaidUsageComponent
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreatePrepaidUsageComponentPricePoint.java b/src/main/java/com/maxio/advancedbilling/models/CreatePrepaidUsageComponentPricePoint.java
index 9d6a41ea..9db775b6 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreatePrepaidUsageComponentPricePoint.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreatePrepaidUsageComponentPricePoint.java
@@ -11,12 +11,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CreatePrepaidUsageComponentPricePoint type.
  */
-public class CreatePrepaidUsageComponentPricePoint {
+public class CreatePrepaidUsageComponentPricePoint
+        extends BaseModel {
     private String name;
     private String handle;
     private PricingScheme pricingScheme;
@@ -306,7 +308,8 @@ public String toString() {
                 + ", handle=" + handle + ", useSiteExchangeRate=" + useSiteExchangeRate
                 + ", rolloverPrepaidRemainder=" + rolloverPrepaidRemainder
                 + ", renewPrepaidAllocation=" + renewPrepaidAllocation + ", expirationInterval="
-                + expirationInterval + ", expirationIntervalUnit=" + expirationIntervalUnit + "]";
+                + expirationInterval + ", expirationIntervalUnit=" + expirationIntervalUnit
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreatePrepayment.java b/src/main/java/com/maxio/advancedbilling/models/CreatePrepayment.java
index 5a956b0c..e6fb3a6d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreatePrepayment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreatePrepayment.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreatePrepayment type.
  */
-public class CreatePrepayment {
+public class CreatePrepayment
+        extends BaseModel {
     private double amount;
     private String details;
     private String memo;
@@ -151,7 +153,8 @@ public void setPaymentProfileId(Integer paymentProfileId) {
     @Override
     public String toString() {
         return "CreatePrepayment [" + "amount=" + amount + ", details=" + details + ", memo=" + memo
-                + ", method=" + method + ", paymentProfileId=" + paymentProfileId + "]";
+                + ", method=" + method + ", paymentProfileId=" + paymentProfileId
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreatePrepaymentRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreatePrepaymentRequest.java
index af6ac255..bca6e603 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreatePrepaymentRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreatePrepaymentRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreatePrepaymentRequest type.
  */
-public class CreatePrepaymentRequest {
+public class CreatePrepaymentRequest
+        extends BaseModel {
     private CreatePrepayment prepayment;
 
     /**
@@ -54,7 +56,8 @@ public void setPrepayment(CreatePrepayment prepayment) {
      */
     @Override
     public String toString() {
-        return "CreatePrepaymentRequest [" + "prepayment=" + prepayment + "]";
+        return "CreatePrepaymentRequest [" + "prepayment=" + prepayment + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreatePrepaymentResponse.java b/src/main/java/com/maxio/advancedbilling/models/CreatePrepaymentResponse.java
index 193522cd..40f3bb26 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreatePrepaymentResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreatePrepaymentResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreatePrepaymentResponse type.
  */
-public class CreatePrepaymentResponse {
+public class CreatePrepaymentResponse
+        extends BaseModel {
     private CreatedPrepayment prepayment;
 
     /**
@@ -54,7 +56,8 @@ public void setPrepayment(CreatedPrepayment prepayment) {
      */
     @Override
     public String toString() {
-        return "CreatePrepaymentResponse [" + "prepayment=" + prepayment + "]";
+        return "CreatePrepaymentResponse [" + "prepayment=" + prepayment + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateProductCurrencyPrice.java b/src/main/java/com/maxio/advancedbilling/models/CreateProductCurrencyPrice.java
index 6251c027..04385155 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateProductCurrencyPrice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateProductCurrencyPrice.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateProductCurrencyPrice type.
  */
-public class CreateProductCurrencyPrice {
+public class CreateProductCurrencyPrice
+        extends BaseModel {
     private String currency;
     private int price;
     private CurrencyPriceRole role;
@@ -105,7 +107,7 @@ public void setRole(CurrencyPriceRole role) {
     @Override
     public String toString() {
         return "CreateProductCurrencyPrice [" + "currency=" + currency + ", price=" + price
-                + ", role=" + role + "]";
+                + ", role=" + role + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateProductCurrencyPricesRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateProductCurrencyPricesRequest.java
index 0bae550f..10ad47c0 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateProductCurrencyPricesRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateProductCurrencyPricesRequest.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CreateProductCurrencyPricesRequest type.
  */
-public class CreateProductCurrencyPricesRequest {
+public class CreateProductCurrencyPricesRequest
+        extends BaseModel {
     private List<CreateProductCurrencyPrice> currencyPrices;
 
     /**
@@ -55,7 +57,8 @@ public void setCurrencyPrices(List<CreateProductCurrencyPrice> currencyPrices) {
      */
     @Override
     public String toString() {
-        return "CreateProductCurrencyPricesRequest [" + "currencyPrices=" + currencyPrices + "]";
+        return "CreateProductCurrencyPricesRequest [" + "currencyPrices=" + currencyPrices
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateProductFamily.java b/src/main/java/com/maxio/advancedbilling/models/CreateProductFamily.java
index e7cb8918..7a64b80a 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateProductFamily.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateProductFamily.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for CreateProductFamily type.
  */
-public class CreateProductFamily {
+public class CreateProductFamily
+        extends BaseModel {
     private String name;
     private OptionalNullable<String> description;
 
@@ -108,7 +110,8 @@ public void unsetDescription() {
      */
     @Override
     public String toString() {
-        return "CreateProductFamily [" + "name=" + name + ", description=" + description + "]";
+        return "CreateProductFamily [" + "name=" + name + ", description=" + description
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateProductFamilyRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateProductFamilyRequest.java
index dfe0c858..a4e9443c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateProductFamilyRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateProductFamilyRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateProductFamilyRequest type.
  */
-public class CreateProductFamilyRequest {
+public class CreateProductFamilyRequest
+        extends BaseModel {
     private CreateProductFamily productFamily;
 
     /**
@@ -54,7 +56,8 @@ public void setProductFamily(CreateProductFamily productFamily) {
      */
     @Override
     public String toString() {
-        return "CreateProductFamilyRequest [" + "productFamily=" + productFamily + "]";
+        return "CreateProductFamilyRequest [" + "productFamily=" + productFamily
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateProductPricePoint.java b/src/main/java/com/maxio/advancedbilling/models/CreateProductPricePoint.java
index 4b558988..ee8421f3 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateProductPricePoint.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateProductPricePoint.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateProductPricePoint type.
  */
-public class CreateProductPricePoint {
+public class CreateProductPricePoint
+        extends BaseModel {
     private String name;
     private String handle;
     private long priceInCents;
@@ -397,7 +399,7 @@ public String toString() {
                 + ", initialChargeInCents=" + initialChargeInCents + ", initialChargeAfterTrial="
                 + initialChargeAfterTrial + ", expirationInterval=" + expirationInterval
                 + ", expirationIntervalUnit=" + expirationIntervalUnit + ", useSiteExchangeRate="
-                + useSiteExchangeRate + "]";
+                + useSiteExchangeRate + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateProductPricePointRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateProductPricePointRequest.java
index c2c3a39a..5539bd6e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateProductPricePointRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateProductPricePointRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateProductPricePointRequest type.
  */
-public class CreateProductPricePointRequest {
+public class CreateProductPricePointRequest
+        extends BaseModel {
     private CreateProductPricePoint pricePoint;
 
     /**
@@ -54,7 +56,8 @@ public void setPricePoint(CreateProductPricePoint pricePoint) {
      */
     @Override
     public String toString() {
-        return "CreateProductPricePointRequest [" + "pricePoint=" + pricePoint + "]";
+        return "CreateProductPricePointRequest [" + "pricePoint=" + pricePoint
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateQuantityBasedComponent.java b/src/main/java/com/maxio/advancedbilling/models/CreateQuantityBasedComponent.java
index f860dc9d..53180383 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateQuantityBasedComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateQuantityBasedComponent.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateQuantityBasedComponent type.
  */
-public class CreateQuantityBasedComponent {
+public class CreateQuantityBasedComponent
+        extends BaseModel {
     private QuantityBasedComponent quantityBasedComponent;
 
     /**
@@ -55,7 +57,7 @@ public void setQuantityBasedComponent(QuantityBasedComponent quantityBasedCompon
     @Override
     public String toString() {
         return "CreateQuantityBasedComponent [" + "quantityBasedComponent=" + quantityBasedComponent
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateReasonCode.java b/src/main/java/com/maxio/advancedbilling/models/CreateReasonCode.java
index 661542c3..4d5ea474 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateReasonCode.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateReasonCode.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateReasonCode type.
  */
-public class CreateReasonCode {
+public class CreateReasonCode
+        extends BaseModel {
     private String code;
     private String description;
     private Integer position;
@@ -107,7 +109,8 @@ public void setPosition(Integer position) {
     @Override
     public String toString() {
         return "CreateReasonCode [" + "code=" + code + ", description=" + description
-                + ", position=" + position + "]";
+                + ", position=" + position + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateReasonCodeRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateReasonCodeRequest.java
index 5f307128..371fb50f 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateReasonCodeRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateReasonCodeRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateReasonCodeRequest type.
  */
-public class CreateReasonCodeRequest {
+public class CreateReasonCodeRequest
+        extends BaseModel {
     private CreateReasonCode reasonCode;
 
     /**
@@ -54,7 +56,8 @@ public void setReasonCode(CreateReasonCode reasonCode) {
      */
     @Override
     public String toString() {
-        return "CreateReasonCodeRequest [" + "reasonCode=" + reasonCode + "]";
+        return "CreateReasonCodeRequest [" + "reasonCode=" + reasonCode + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateSegment.java b/src/main/java/com/maxio/advancedbilling/models/CreateSegment.java
index bc225b2d..35c18208 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateSegment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateSegment.java
@@ -13,12 +13,14 @@
 import com.maxio.advancedbilling.models.containers.CreateSegmentSegmentProperty2Value;
 import com.maxio.advancedbilling.models.containers.CreateSegmentSegmentProperty3Value;
 import com.maxio.advancedbilling.models.containers.CreateSegmentSegmentProperty4Value;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CreateSegment type.
  */
-public class CreateSegment {
+public class CreateSegment
+        extends BaseModel {
     private CreateSegmentSegmentProperty1Value segmentProperty1Value;
     private CreateSegmentSegmentProperty2Value segmentProperty2Value;
     private CreateSegmentSegmentProperty3Value segmentProperty3Value;
@@ -204,7 +206,8 @@ public String toString() {
         return "CreateSegment [" + "pricingScheme=" + pricingScheme + ", segmentProperty1Value="
                 + segmentProperty1Value + ", segmentProperty2Value=" + segmentProperty2Value
                 + ", segmentProperty3Value=" + segmentProperty3Value + ", segmentProperty4Value="
-                + segmentProperty4Value + ", prices=" + prices + "]";
+                + segmentProperty4Value + ", prices=" + prices + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateSegmentRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateSegmentRequest.java
index 6b8e5f8c..40b436af 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateSegmentRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateSegmentRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateSegmentRequest type.
  */
-public class CreateSegmentRequest {
+public class CreateSegmentRequest
+        extends BaseModel {
     private CreateSegment segment;
 
     /**
@@ -54,7 +56,8 @@ public void setSegment(CreateSegment segment) {
      */
     @Override
     public String toString() {
-        return "CreateSegmentRequest [" + "segment=" + segment + "]";
+        return "CreateSegmentRequest [" + "segment=" + segment + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateSubscription.java b/src/main/java/com/maxio/advancedbilling/models/CreateSubscription.java
index 689b5def..5b8c3fb5 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateSubscription.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateSubscription.java
@@ -13,6 +13,7 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
 import com.maxio.advancedbilling.models.containers.CreateSubscriptionOfferId;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 import java.util.List;
@@ -21,7 +22,8 @@
 /**
  * This is a model class for CreateSubscription type.
  */
-public class CreateSubscription {
+public class CreateSubscription
+        extends BaseModel {
     private String productHandle;
     private Integer productId;
     private String productPricePointHandle;
@@ -1599,7 +1601,8 @@ public String toString() {
                 + ", agreementAcceptance=" + agreementAcceptance + ", achAgreement=" + achAgreement
                 + ", dunningCommunicationDelayEnabled=" + dunningCommunicationDelayEnabled
                 + ", dunningCommunicationDelayTimeZone=" + dunningCommunicationDelayTimeZone
-                + ", skipBillingManifestTaxes=" + skipBillingManifestTaxes + "]";
+                + ", skipBillingManifestTaxes=" + skipBillingManifestTaxes
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateSubscriptionComponent.java b/src/main/java/com/maxio/advancedbilling/models/CreateSubscriptionComponent.java
index d85f35f6..8bb889ac 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateSubscriptionComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateSubscriptionComponent.java
@@ -12,11 +12,13 @@
 import com.maxio.advancedbilling.models.containers.CreateSubscriptionComponentAllocatedQuantity;
 import com.maxio.advancedbilling.models.containers.CreateSubscriptionComponentComponentId;
 import com.maxio.advancedbilling.models.containers.CreateSubscriptionComponentPricePointId;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateSubscriptionComponent type.
  */
-public class CreateSubscriptionComponent {
+public class CreateSubscriptionComponent
+        extends BaseModel {
     private CreateSubscriptionComponentComponentId componentId;
     private Boolean enabled;
     private Integer unitBalance;
@@ -213,7 +215,8 @@ public String toString() {
         return "CreateSubscriptionComponent [" + "componentId=" + componentId + ", enabled="
                 + enabled + ", unitBalance=" + unitBalance + ", allocatedQuantity="
                 + allocatedQuantity + ", quantity=" + quantity + ", pricePointId=" + pricePointId
-                + ", customPrice=" + customPrice + "]";
+                + ", customPrice=" + customPrice + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateSubscriptionGroup.java b/src/main/java/com/maxio/advancedbilling/models/CreateSubscriptionGroup.java
index 10f24377..57202894 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateSubscriptionGroup.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateSubscriptionGroup.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.CreateSubscriptionGroupSubscriptionId;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CreateSubscriptionGroup type.
  */
-public class CreateSubscriptionGroup {
+public class CreateSubscriptionGroup
+        extends BaseModel {
     private CreateSubscriptionGroupSubscriptionId subscriptionId;
     private List<Integer> memberIds;
 
@@ -81,7 +83,7 @@ public void setMemberIds(List<Integer> memberIds) {
     @Override
     public String toString() {
         return "CreateSubscriptionGroup [" + "subscriptionId=" + subscriptionId + ", memberIds="
-                + memberIds + "]";
+                + memberIds + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateSubscriptionGroupRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateSubscriptionGroupRequest.java
index 18941249..c10cdac1 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateSubscriptionGroupRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateSubscriptionGroupRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateSubscriptionGroupRequest type.
  */
-public class CreateSubscriptionGroupRequest {
+public class CreateSubscriptionGroupRequest
+        extends BaseModel {
     private CreateSubscriptionGroup subscriptionGroup;
 
     /**
@@ -54,7 +56,8 @@ public void setSubscriptionGroup(CreateSubscriptionGroup subscriptionGroup) {
      */
     @Override
     public String toString() {
-        return "CreateSubscriptionGroupRequest [" + "subscriptionGroup=" + subscriptionGroup + "]";
+        return "CreateSubscriptionGroupRequest [" + "subscriptionGroup=" + subscriptionGroup
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateSubscriptionRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateSubscriptionRequest.java
index 3dd15d37..642adb39 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateSubscriptionRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateSubscriptionRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateSubscriptionRequest type.
  */
-public class CreateSubscriptionRequest {
+public class CreateSubscriptionRequest
+        extends BaseModel {
     private CreateSubscription subscription;
 
     /**
@@ -54,7 +56,8 @@ public void setSubscription(CreateSubscription subscription) {
      */
     @Override
     public String toString() {
-        return "CreateSubscriptionRequest [" + "subscription=" + subscription + "]";
+        return "CreateSubscriptionRequest [" + "subscription=" + subscription
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateUsage.java b/src/main/java/com/maxio/advancedbilling/models/CreateUsage.java
index 7e28b582..2f2b9698 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateUsage.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateUsage.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateUsage type.
  */
-public class CreateUsage {
+public class CreateUsage
+        extends BaseModel {
     private Double quantity;
     private String pricePointId;
     private String memo;
@@ -134,7 +136,8 @@ public void setBillingSchedule(BillingSchedule billingSchedule) {
     @Override
     public String toString() {
         return "CreateUsage [" + "quantity=" + quantity + ", pricePointId=" + pricePointId
-                + ", memo=" + memo + ", billingSchedule=" + billingSchedule + "]";
+                + ", memo=" + memo + ", billingSchedule=" + billingSchedule
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreateUsageRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreateUsageRequest.java
index 7c9e7d62..019a1748 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreateUsageRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreateUsageRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreateUsageRequest type.
  */
-public class CreateUsageRequest {
+public class CreateUsageRequest
+        extends BaseModel {
     private CreateUsage usage;
 
     /**
@@ -54,7 +56,8 @@ public void setUsage(CreateUsage usage) {
      */
     @Override
     public String toString() {
-        return "CreateUsageRequest [" + "usage=" + usage + "]";
+        return "CreateUsageRequest [" + "usage=" + usage + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreatedPrepayment.java b/src/main/java/com/maxio/advancedbilling/models/CreatedPrepayment.java
index 4d266252..0c78a0df 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreatedPrepayment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreatedPrepayment.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for CreatedPrepayment type.
  */
-public class CreatedPrepayment {
+public class CreatedPrepayment
+        extends BaseModel {
     private Integer id;
     private Integer subscriptionId;
     private Long amountInCents;
@@ -203,7 +205,8 @@ public String toString() {
         return "CreatedPrepayment [" + "id=" + id + ", subscriptionId=" + subscriptionId
                 + ", amountInCents=" + amountInCents + ", memo=" + memo + ", createdAt=" + createdAt
                 + ", startingBalanceInCents=" + startingBalanceInCents + ", endingBalanceInCents="
-                + endingBalanceInCents + "]";
+                + endingBalanceInCents + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreditAccountBalanceChanged.java b/src/main/java/com/maxio/advancedbilling/models/CreditAccountBalanceChanged.java
index e3831e82..caa691ff 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreditAccountBalanceChanged.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreditAccountBalanceChanged.java
@@ -13,12 +13,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for CreditAccountBalanceChanged type.
  */
-public class CreditAccountBalanceChanged {
+public class CreditAccountBalanceChanged
+        extends BaseModel {
     private String reason;
     private long serviceCreditAccountBalanceInCents;
     private long serviceCreditBalanceChangeInCents;
@@ -155,7 +157,8 @@ public String toString() {
         return "CreditAccountBalanceChanged [" + "reason=" + reason
                 + ", serviceCreditAccountBalanceInCents=" + serviceCreditAccountBalanceInCents
                 + ", serviceCreditBalanceChangeInCents=" + serviceCreditBalanceChangeInCents
-                + ", currencyCode=" + currencyCode + ", atTime=" + atTime + "]";
+                + ", currencyCode=" + currencyCode + ", atTime=" + atTime
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreditCardAttributes.java b/src/main/java/com/maxio/advancedbilling/models/CreditCardAttributes.java
index efb71656..f66dab1b 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreditCardAttributes.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreditCardAttributes.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreditCardAttributes type.
  */
-public class CreditCardAttributes {
+public class CreditCardAttributes
+        extends BaseModel {
     private String fullNumber;
     private String expirationMonth;
     private String expirationYear;
@@ -103,7 +105,8 @@ public void setExpirationYear(String expirationYear) {
     @Override
     public String toString() {
         return "CreditCardAttributes [" + "fullNumber=" + fullNumber + ", expirationMonth="
-                + expirationMonth + ", expirationYear=" + expirationYear + "]";
+                + expirationMonth + ", expirationYear=" + expirationYear + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreditCardPaymentProfile.java b/src/main/java/com/maxio/advancedbilling/models/CreditCardPaymentProfile.java
index 343381a4..11078e91 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreditCardPaymentProfile.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreditCardPaymentProfile.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for CreditCardPaymentProfile type.
  */
-public class CreditCardPaymentProfile {
+public class CreditCardPaymentProfile
+        extends BaseModel {
     private Integer id;
     private String firstName;
     private String lastName;
@@ -867,7 +869,7 @@ public String toString() {
                 + customerVaultToken + ", billingAddress2=" + billingAddress2 + ", paymentType="
                 + paymentType + ", disabled=" + disabled + ", chargifyToken=" + chargifyToken
                 + ", siteGatewaySettingId=" + siteGatewaySettingId + ", gatewayHandle="
-                + gatewayHandle + "]";
+                + gatewayHandle + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreditNote.java b/src/main/java/com/maxio/advancedbilling/models/CreditNote.java
index 34ceadfa..be622796 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreditNote.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreditNote.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.LocalDate;
 import java.util.List;
 
 /**
  * This is a model class for CreditNote type.
  */
-public class CreditNote {
+public class CreditNote
+        extends BaseModel {
     private String uid;
     private Integer siteId;
     private Integer customerId;
@@ -759,7 +761,8 @@ public String toString() {
                 + ", totalAmount=" + totalAmount + ", appliedAmount=" + appliedAmount
                 + ", remainingAmount=" + remainingAmount + ", lineItems=" + lineItems
                 + ", discounts=" + discounts + ", taxes=" + taxes + ", applications=" + applications
-                + ", refunds=" + refunds + ", originInvoices=" + originInvoices + "]";
+                + ", refunds=" + refunds + ", originInvoices=" + originInvoices
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreditNote1.java b/src/main/java/com/maxio/advancedbilling/models/CreditNote1.java
index e8246e0a..376d534d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreditNote1.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreditNote1.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.LocalDate;
 import java.util.List;
 
 /**
  * This is a model class for CreditNote1 type.
  */
-public class CreditNote1 {
+public class CreditNote1
+        extends BaseModel {
     private String uid;
     private Integer siteId;
     private Integer customerId;
@@ -751,7 +753,8 @@ public String toString() {
                 + ", totalAmount=" + totalAmount + ", appliedAmount=" + appliedAmount
                 + ", remainingAmount=" + remainingAmount + ", lineItems=" + lineItems
                 + ", discounts=" + discounts + ", taxes=" + taxes + ", applications=" + applications
-                + ", refunds=" + refunds + ", originInvoices=" + originInvoices + "]";
+                + ", refunds=" + refunds + ", originInvoices=" + originInvoices
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreditNoteApplication.java b/src/main/java/com/maxio/advancedbilling/models/CreditNoteApplication.java
index e2ced769..e64a415e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreditNoteApplication.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreditNoteApplication.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for CreditNoteApplication type.
  */
-public class CreditNoteApplication {
+public class CreditNoteApplication
+        extends BaseModel {
     private String uid;
     private ZonedDateTime transactionTime;
     private String invoiceUid;
@@ -156,7 +158,7 @@ public void setAppliedAmount(String appliedAmount) {
     public String toString() {
         return "CreditNoteApplication [" + "uid=" + uid + ", transactionTime=" + transactionTime
                 + ", invoiceUid=" + invoiceUid + ", memo=" + memo + ", appliedAmount="
-                + appliedAmount + "]";
+                + appliedAmount + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreditNoteLineItem.java b/src/main/java/com/maxio/advancedbilling/models/CreditNoteLineItem.java
index 50b87521..e566ce28 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreditNoteLineItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreditNoteLineItem.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.LocalDate;
 
 /**
  * This is a model class for CreditNoteLineItem type.
  */
-public class CreditNoteLineItem {
+public class CreditNoteLineItem
+        extends BaseModel {
     private String uid;
     private String title;
     private String description;
@@ -638,7 +640,7 @@ public String toString() {
                 + periodRangeEnd + ", productId=" + productId + ", productVersion=" + productVersion
                 + ", componentId=" + componentId + ", pricePointId=" + pricePointId
                 + ", billingScheduleItemId=" + billingScheduleItemId + ", customItem=" + customItem
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CreditSchemeRequest.java b/src/main/java/com/maxio/advancedbilling/models/CreditSchemeRequest.java
index c6609a02..c940d78a 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CreditSchemeRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CreditSchemeRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CreditSchemeRequest type.
  */
-public class CreditSchemeRequest {
+public class CreditSchemeRequest
+        extends BaseModel {
     private CreditScheme creditScheme;
 
     /**
@@ -54,7 +56,8 @@ public void setCreditScheme(CreditScheme creditScheme) {
      */
     @Override
     public String toString() {
-        return "CreditSchemeRequest [" + "creditScheme=" + creditScheme + "]";
+        return "CreditSchemeRequest [" + "creditScheme=" + creditScheme + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CurrencyPrice.java b/src/main/java/com/maxio/advancedbilling/models/CurrencyPrice.java
index 2d1f0887..457bb11e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CurrencyPrice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CurrencyPrice.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CurrencyPrice type.
  */
-public class CurrencyPrice {
+public class CurrencyPrice
+        extends BaseModel {
     private Integer id;
     private String currency;
     private Double price;
@@ -175,7 +177,8 @@ public void setRole(CurrencyPriceRole role) {
     public String toString() {
         return "CurrencyPrice [" + "id=" + id + ", currency=" + currency + ", price=" + price
                 + ", formattedPrice=" + formattedPrice + ", productPricePointId="
-                + productPricePointId + ", role=" + role + "]";
+                + productPricePointId + ", role=" + role + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CurrencyPricesResponse.java b/src/main/java/com/maxio/advancedbilling/models/CurrencyPricesResponse.java
index db73f980..cfbcab5d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CurrencyPricesResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CurrencyPricesResponse.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CurrencyPricesResponse type.
  */
-public class CurrencyPricesResponse {
+public class CurrencyPricesResponse
+        extends BaseModel {
     private List<CurrencyPrice> currencyPrices;
 
     /**
@@ -55,7 +57,8 @@ public void setCurrencyPrices(List<CurrencyPrice> currencyPrices) {
      */
     @Override
     public String toString() {
-        return "CurrencyPricesResponse [" + "currencyPrices=" + currencyPrices + "]";
+        return "CurrencyPricesResponse [" + "currencyPrices=" + currencyPrices
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CustomFieldValueChange.java b/src/main/java/com/maxio/advancedbilling/models/CustomFieldValueChange.java
index b3bd16c2..16522639 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CustomFieldValueChange.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CustomFieldValueChange.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CustomFieldValueChange type.
  */
-public class CustomFieldValueChange {
+public class CustomFieldValueChange
+        extends BaseModel {
     private String eventType;
     private String metafieldName;
     private int metafieldId;
@@ -192,7 +194,7 @@ public String toString() {
         return "CustomFieldValueChange [" + "eventType=" + eventType + ", metafieldName="
                 + metafieldName + ", metafieldId=" + metafieldId + ", oldValue=" + oldValue
                 + ", newValue=" + newValue + ", resourceType=" + resourceType + ", resourceId="
-                + resourceId + "]";
+                + resourceId + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Customer.java b/src/main/java/com/maxio/advancedbilling/models/Customer.java
index f50f60a5..3237b3a9 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Customer.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Customer.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for Customer type.
  */
-public class Customer {
+public class Customer
+        extends BaseModel {
     private String firstName;
     private String lastName;
     private String email;
@@ -1183,7 +1185,8 @@ public String toString() {
                 + ", portalInviteLastSentAt=" + portalInviteLastSentAt
                 + ", portalInviteLastAcceptedAt=" + portalInviteLastAcceptedAt + ", taxExempt="
                 + taxExempt + ", vatNumber=" + vatNumber + ", parentId=" + parentId + ", locale="
-                + locale + ", defaultSubscriptionGroupUid=" + defaultSubscriptionGroupUid + "]";
+                + locale + ", defaultSubscriptionGroupUid=" + defaultSubscriptionGroupUid
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Customer1.java b/src/main/java/com/maxio/advancedbilling/models/Customer1.java
index 53750233..622caa54 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Customer1.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Customer1.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for Customer1 type.
  */
-public class Customer1 {
+public class Customer1
+        extends BaseModel {
     private OptionalNullable<Integer> chargifyId;
     private String firstName;
     private String lastName;
@@ -285,7 +287,8 @@ public void unsetReference() {
     public String toString() {
         return "Customer1 [" + "chargifyId=" + chargifyId + ", firstName=" + firstName
                 + ", lastName=" + lastName + ", organization=" + organization + ", email=" + email
-                + ", vatNumber=" + vatNumber + ", reference=" + reference + "]";
+                + ", vatNumber=" + vatNumber + ", reference=" + reference
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CustomerAttributes.java b/src/main/java/com/maxio/advancedbilling/models/CustomerAttributes.java
index 72b70b7d..12eae56a 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CustomerAttributes.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CustomerAttributes.java
@@ -10,13 +10,15 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.util.Map;
 
 /**
  * This is a model class for CustomerAttributes type.
  */
-public class CustomerAttributes {
+public class CustomerAttributes
+        extends BaseModel {
     private String firstName;
     private String lastName;
     private String email;
@@ -593,7 +595,7 @@ public String toString() {
                 + ", city=" + city + ", state=" + state + ", zip=" + zip + ", country=" + country
                 + ", phone=" + phone + ", verified=" + verified + ", taxExempt=" + taxExempt
                 + ", vatNumber=" + vatNumber + ", metafields=" + metafields + ", parentId="
-                + parentId + "]";
+                + parentId + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CustomerChange.java b/src/main/java/com/maxio/advancedbilling/models/CustomerChange.java
index 68b0aa7d..6451be32 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CustomerChange.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CustomerChange.java
@@ -14,12 +14,14 @@
 import com.maxio.advancedbilling.models.containers.CustomerChangeCustomFields;
 import com.maxio.advancedbilling.models.containers.CustomerChangePayer;
 import com.maxio.advancedbilling.models.containers.CustomerChangeShippingAddress;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for CustomerChange type.
  */
-public class CustomerChange {
+public class CustomerChange
+        extends BaseModel {
     private OptionalNullable<CustomerChangePayer> payer;
     private OptionalNullable<CustomerChangeShippingAddress> shippingAddress;
     private OptionalNullable<CustomerChangeBillingAddress> billingAddress;
@@ -214,7 +216,8 @@ public void unsetCustomFields() {
     @Override
     public String toString() {
         return "CustomerChange [" + "payer=" + payer + ", shippingAddress=" + shippingAddress
-                + ", billingAddress=" + billingAddress + ", customFields=" + customFields + "]";
+                + ", billingAddress=" + billingAddress + ", customFields=" + customFields
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CustomerChangesPreviewResponse.java b/src/main/java/com/maxio/advancedbilling/models/CustomerChangesPreviewResponse.java
index d6768cdb..edc5b147 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CustomerChangesPreviewResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CustomerChangesPreviewResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CustomerChangesPreviewResponse type.
  */
-public class CustomerChangesPreviewResponse {
+public class CustomerChangesPreviewResponse
+        extends BaseModel {
     private CustomerChange changes;
 
     /**
@@ -54,7 +56,8 @@ public void setChanges(CustomerChange changes) {
      */
     @Override
     public String toString() {
-        return "CustomerChangesPreviewResponse [" + "changes=" + changes + "]";
+        return "CustomerChangesPreviewResponse [" + "changes=" + changes + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CustomerCustomFieldsChange.java b/src/main/java/com/maxio/advancedbilling/models/CustomerCustomFieldsChange.java
index c325d9d0..d2f16d1a 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CustomerCustomFieldsChange.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CustomerCustomFieldsChange.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for CustomerCustomFieldsChange type.
  */
-public class CustomerCustomFieldsChange {
+public class CustomerCustomFieldsChange
+        extends BaseModel {
     private List<InvoiceCustomField> before;
     private List<InvoiceCustomField> after;
 
@@ -80,7 +82,8 @@ public void setAfter(List<InvoiceCustomField> after) {
      */
     @Override
     public String toString() {
-        return "CustomerCustomFieldsChange [" + "before=" + before + ", after=" + after + "]";
+        return "CustomerCustomFieldsChange [" + "before=" + before + ", after=" + after
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CustomerError.java b/src/main/java/com/maxio/advancedbilling/models/CustomerError.java
index 8273b339..e8553f0c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CustomerError.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CustomerError.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CustomerError type.
  */
-public class CustomerError {
+public class CustomerError
+        extends BaseModel {
     private String customer;
 
     /**
@@ -56,7 +58,8 @@ public void setCustomer(String customer) {
      */
     @Override
     public String toString() {
-        return "CustomerError [" + "customer=" + customer + "]";
+        return "CustomerError [" + "customer=" + customer + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CustomerPayerChange.java b/src/main/java/com/maxio/advancedbilling/models/CustomerPayerChange.java
index 4ea31310..dfac23ae 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CustomerPayerChange.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CustomerPayerChange.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CustomerPayerChange type.
  */
-public class CustomerPayerChange {
+public class CustomerPayerChange
+        extends BaseModel {
     private InvoicePayerChange before;
     private InvoicePayerChange after;
 
@@ -79,7 +81,8 @@ public void setAfter(InvoicePayerChange after) {
      */
     @Override
     public String toString() {
-        return "CustomerPayerChange [" + "before=" + before + ", after=" + after + "]";
+        return "CustomerPayerChange [" + "before=" + before + ", after=" + after
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/CustomerResponse.java b/src/main/java/com/maxio/advancedbilling/models/CustomerResponse.java
index 182a3d22..0610b7e5 100644
--- a/src/main/java/com/maxio/advancedbilling/models/CustomerResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/CustomerResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for CustomerResponse type.
  */
-public class CustomerResponse {
+public class CustomerResponse
+        extends BaseModel {
     private Customer customer;
 
     /**
@@ -54,7 +56,8 @@ public void setCustomer(Customer customer) {
      */
     @Override
     public String toString() {
-        return "CustomerResponse [" + "customer=" + customer + "]";
+        return "CustomerResponse [" + "customer=" + customer + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/DeductServiceCredit.java b/src/main/java/com/maxio/advancedbilling/models/DeductServiceCredit.java
index a9191d74..6316598c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/DeductServiceCredit.java
+++ b/src/main/java/com/maxio/advancedbilling/models/DeductServiceCredit.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.DeductServiceCreditAmount;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for DeductServiceCredit type.
  */
-public class DeductServiceCredit {
+public class DeductServiceCredit
+        extends BaseModel {
     private DeductServiceCreditAmount amount;
     private String memo;
 
@@ -77,7 +79,8 @@ public void setMemo(String memo) {
      */
     @Override
     public String toString() {
-        return "DeductServiceCredit [" + "amount=" + amount + ", memo=" + memo + "]";
+        return "DeductServiceCredit [" + "amount=" + amount + ", memo=" + memo
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/DeductServiceCreditRequest.java b/src/main/java/com/maxio/advancedbilling/models/DeductServiceCreditRequest.java
index 3f67b834..341f205d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/DeductServiceCreditRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/DeductServiceCreditRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for DeductServiceCreditRequest type.
  */
-public class DeductServiceCreditRequest {
+public class DeductServiceCreditRequest
+        extends BaseModel {
     private DeductServiceCredit deduction;
 
     /**
@@ -54,7 +56,8 @@ public void setDeduction(DeductServiceCredit deduction) {
      */
     @Override
     public String toString() {
-        return "DeductServiceCreditRequest [" + "deduction=" + deduction + "]";
+        return "DeductServiceCreditRequest [" + "deduction=" + deduction + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/DelayedCancellationResponse.java b/src/main/java/com/maxio/advancedbilling/models/DelayedCancellationResponse.java
index 70f3f72b..45585933 100644
--- a/src/main/java/com/maxio/advancedbilling/models/DelayedCancellationResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/DelayedCancellationResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for DelayedCancellationResponse type.
  */
-public class DelayedCancellationResponse {
+public class DelayedCancellationResponse
+        extends BaseModel {
     private String message;
 
     /**
@@ -56,7 +58,8 @@ public void setMessage(String message) {
      */
     @Override
     public String toString() {
-        return "DelayedCancellationResponse [" + "message=" + message + "]";
+        return "DelayedCancellationResponse [" + "message=" + message + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/DeleteSubscriptionGroupResponse.java b/src/main/java/com/maxio/advancedbilling/models/DeleteSubscriptionGroupResponse.java
index ee4cead7..9805756a 100644
--- a/src/main/java/com/maxio/advancedbilling/models/DeleteSubscriptionGroupResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/DeleteSubscriptionGroupResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for DeleteSubscriptionGroupResponse type.
  */
-public class DeleteSubscriptionGroupResponse {
+public class DeleteSubscriptionGroupResponse
+        extends BaseModel {
     private String uid;
     private Boolean deleted;
 
@@ -79,7 +81,8 @@ public void setDeleted(Boolean deleted) {
      */
     @Override
     public String toString() {
-        return "DeleteSubscriptionGroupResponse [" + "uid=" + uid + ", deleted=" + deleted + "]";
+        return "DeleteSubscriptionGroupResponse [" + "uid=" + uid + ", deleted=" + deleted
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/DunnerData.java b/src/main/java/com/maxio/advancedbilling/models/DunnerData.java
index 54465582..95612973 100644
--- a/src/main/java/com/maxio/advancedbilling/models/DunnerData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/DunnerData.java
@@ -11,12 +11,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for DunnerData type.
  */
-public class DunnerData {
+public class DunnerData
+        extends BaseModel {
     private String state;
     private int subscriptionId;
     private long revenueAtRiskInCents;
@@ -174,7 +176,8 @@ public void setLastAttemptedAt(ZonedDateTime lastAttemptedAt) {
     public String toString() {
         return "DunnerData [" + "state=" + state + ", subscriptionId=" + subscriptionId
                 + ", revenueAtRiskInCents=" + revenueAtRiskInCents + ", createdAt=" + createdAt
-                + ", attempts=" + attempts + ", lastAttemptedAt=" + lastAttemptedAt + "]";
+                + ", attempts=" + attempts + ", lastAttemptedAt=" + lastAttemptedAt
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/DunningStepData.java b/src/main/java/com/maxio/advancedbilling/models/DunningStepData.java
index d2204d3e..ac1f427e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/DunningStepData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/DunningStepData.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for DunningStepData type.
  */
-public class DunningStepData {
+public class DunningStepData
+        extends BaseModel {
     private int dayThreshold;
     private String action;
     private OptionalNullable<String> emailBody;
@@ -290,7 +292,8 @@ public String toString() {
         return "DunningStepData [" + "dayThreshold=" + dayThreshold + ", action=" + action
                 + ", sendEmail=" + sendEmail + ", sendBccEmail=" + sendBccEmail + ", sendSms="
                 + sendSms + ", emailBody=" + emailBody + ", emailSubject=" + emailSubject
-                + ", smsBody=" + smsBody + "]";
+                + ", smsBody=" + smsBody + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/DunningStepReached.java b/src/main/java/com/maxio/advancedbilling/models/DunningStepReached.java
index a1821053..d1fd73f9 100644
--- a/src/main/java/com/maxio/advancedbilling/models/DunningStepReached.java
+++ b/src/main/java/com/maxio/advancedbilling/models/DunningStepReached.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for DunningStepReached type.
  */
-public class DunningStepReached {
+public class DunningStepReached
+        extends BaseModel {
     private DunnerData dunner;
     private DunningStepData currentStep;
     private DunningStepData nextStep;
@@ -102,7 +104,8 @@ public void setNextStep(DunningStepData nextStep) {
     @Override
     public String toString() {
         return "DunningStepReached [" + "dunner=" + dunner + ", currentStep=" + currentStep
-                + ", nextStep=" + nextStep + "]";
+                + ", nextStep=" + nextStep + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/EBBComponent.java b/src/main/java/com/maxio/advancedbilling/models/EBBComponent.java
index 35179056..f17f251c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/EBBComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/EBBComponent.java
@@ -11,13 +11,15 @@
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.models.containers.EBBComponentUnitPrice;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.util.List;
 
 /**
  * This is a model class for EBBComponent type.
  */
-public class EBBComponent {
+public class EBBComponent
+        extends BaseModel {
     private String name;
     private String unitName;
     private String description;
@@ -585,7 +587,7 @@ public String toString() {
                 + downgradeCredit + ", pricePoints=" + pricePoints + ", unitPrice=" + unitPrice
                 + ", taxCode=" + taxCode + ", hideDateRangeOnInvoice=" + hideDateRangeOnInvoice
                 + ", priceInCents=" + priceInCents + ", interval=" + interval + ", intervalUnit="
-                + intervalUnit + "]";
+                + intervalUnit + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/EBBEvent.java b/src/main/java/com/maxio/advancedbilling/models/EBBEvent.java
index bfdd73b1..2353927d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/EBBEvent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/EBBEvent.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for EBBEvent type.
  */
-public class EBBEvent {
+public class EBBEvent
+        extends BaseModel {
     private ChargifyEBB chargify;
 
     /**
@@ -56,7 +58,8 @@ public void setChargify(ChargifyEBB chargify) {
      */
     @Override
     public String toString() {
-        return "EBBEvent [" + "chargify=" + chargify + "]";
+        return "EBBEvent [" + "chargify=" + chargify + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/EnableWebhooksRequest.java b/src/main/java/com/maxio/advancedbilling/models/EnableWebhooksRequest.java
index df07f278..336cb317 100644
--- a/src/main/java/com/maxio/advancedbilling/models/EnableWebhooksRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/EnableWebhooksRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for EnableWebhooksRequest type.
  */
-public class EnableWebhooksRequest {
+public class EnableWebhooksRequest
+        extends BaseModel {
     private boolean webhooksEnabled;
 
     /**
@@ -54,7 +56,8 @@ public void setWebhooksEnabled(boolean webhooksEnabled) {
      */
     @Override
     public String toString() {
-        return "EnableWebhooksRequest [" + "webhooksEnabled=" + webhooksEnabled + "]";
+        return "EnableWebhooksRequest [" + "webhooksEnabled=" + webhooksEnabled
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/EnableWebhooksResponse.java b/src/main/java/com/maxio/advancedbilling/models/EnableWebhooksResponse.java
index 552ef7cc..f53c6614 100644
--- a/src/main/java/com/maxio/advancedbilling/models/EnableWebhooksResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/EnableWebhooksResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for EnableWebhooksResponse type.
  */
-public class EnableWebhooksResponse {
+public class EnableWebhooksResponse
+        extends BaseModel {
     private Boolean webhooksEnabled;
 
     /**
@@ -56,7 +58,8 @@ public void setWebhooksEnabled(Boolean webhooksEnabled) {
      */
     @Override
     public String toString() {
-        return "EnableWebhooksResponse [" + "webhooksEnabled=" + webhooksEnabled + "]";
+        return "EnableWebhooksResponse [" + "webhooksEnabled=" + webhooksEnabled
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Endpoint.java b/src/main/java/com/maxio/advancedbilling/models/Endpoint.java
index 7a2aa2c9..aa9f6ded 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Endpoint.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Endpoint.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for Endpoint type.
  */
-public class Endpoint {
+public class Endpoint
+        extends BaseModel {
     private Integer id;
     private String url;
     private Integer siteId;
@@ -150,7 +152,8 @@ public void setWebhookSubscriptions(List<String> webhookSubscriptions) {
     @Override
     public String toString() {
         return "Endpoint [" + "id=" + id + ", url=" + url + ", siteId=" + siteId + ", status="
-                + status + ", webhookSubscriptions=" + webhookSubscriptions + "]";
+                + status + ", webhookSubscriptions=" + webhookSubscriptions
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/EndpointResponse.java b/src/main/java/com/maxio/advancedbilling/models/EndpointResponse.java
index 3c13d855..d6f2ff35 100644
--- a/src/main/java/com/maxio/advancedbilling/models/EndpointResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/EndpointResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for EndpointResponse type.
  */
-public class EndpointResponse {
+public class EndpointResponse
+        extends BaseModel {
     private Endpoint endpoint;
 
     /**
@@ -56,7 +58,8 @@ public void setEndpoint(Endpoint endpoint) {
      */
     @Override
     public String toString() {
-        return "EndpointResponse [" + "endpoint=" + endpoint + "]";
+        return "EndpointResponse [" + "endpoint=" + endpoint + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Errors.java b/src/main/java/com/maxio/advancedbilling/models/Errors.java
index 81ec8e19..4ebe8ab2 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Errors.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Errors.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for Errors type.
  */
-public class Errors {
+public class Errors
+        extends BaseModel {
     private List<String> perPage;
     private List<String> pricePoint;
 
@@ -80,7 +82,8 @@ public void setPricePoint(List<String> pricePoint) {
      */
     @Override
     public String toString() {
-        return "Errors [" + "perPage=" + perPage + ", pricePoint=" + pricePoint + "]";
+        return "Errors [" + "perPage=" + perPage + ", pricePoint=" + pricePoint
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Event.java b/src/main/java/com/maxio/advancedbilling/models/Event.java
index 741be8af..7cbc8116 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Event.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Event.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
 import com.maxio.advancedbilling.models.containers.EventEventSpecificData;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for Event type.
  */
-public class Event {
+public class Event
+        extends BaseModel {
     private int id;
     private String key;
     private String message;
@@ -195,7 +197,8 @@ public void setEventSpecificData(EventEventSpecificData eventSpecificData) {
     public String toString() {
         return "Event [" + "id=" + id + ", key=" + key + ", message=" + message
                 + ", subscriptionId=" + subscriptionId + ", customerId=" + customerId
-                + ", createdAt=" + createdAt + ", eventSpecificData=" + eventSpecificData + "]";
+                + ", createdAt=" + createdAt + ", eventSpecificData=" + eventSpecificData
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/EventBasedBillingSegmentError.java b/src/main/java/com/maxio/advancedbilling/models/EventBasedBillingSegmentError.java
index ed7fb3a7..7270d3d8 100644
--- a/src/main/java/com/maxio/advancedbilling/models/EventBasedBillingSegmentError.java
+++ b/src/main/java/com/maxio/advancedbilling/models/EventBasedBillingSegmentError.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.Map;
 
 /**
  * This is a model class for EventBasedBillingSegmentError type.
  */
-public class EventBasedBillingSegmentError {
+public class EventBasedBillingSegmentError
+        extends BaseModel {
     private Map<String, Object> segments;
 
     /**
@@ -61,7 +63,8 @@ public void setSegments(Map<String, Object> segments) {
      */
     @Override
     public String toString() {
-        return "EventBasedBillingSegmentError [" + "segments=" + segments + "]";
+        return "EventBasedBillingSegmentError [" + "segments=" + segments
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/EventResponse.java b/src/main/java/com/maxio/advancedbilling/models/EventResponse.java
index 56ee5cf6..d7fc6107 100644
--- a/src/main/java/com/maxio/advancedbilling/models/EventResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/EventResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for EventResponse type.
  */
-public class EventResponse {
+public class EventResponse
+        extends BaseModel {
     private Event event;
 
     /**
@@ -54,7 +56,8 @@ public void setEvent(Event event) {
      */
     @Override
     public String toString() {
-        return "EventResponse [" + "event=" + event + "]";
+        return "EventResponse [" + "event=" + event + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/FullSubscriptionGroupResponse.java b/src/main/java/com/maxio/advancedbilling/models/FullSubscriptionGroupResponse.java
index b2985ff4..9639c313 100644
--- a/src/main/java/com/maxio/advancedbilling/models/FullSubscriptionGroupResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/FullSubscriptionGroupResponse.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 import java.util.List;
 
 /**
  * This is a model class for FullSubscriptionGroupResponse type.
  */
-public class FullSubscriptionGroupResponse {
+public class FullSubscriptionGroupResponse
+        extends BaseModel {
     private String uid;
     private Integer scheme;
     private Integer customerId;
@@ -322,7 +324,8 @@ public String toString() {
                 + primarySubscriptionId + ", nextAssessmentAt=" + nextAssessmentAt + ", state="
                 + state + ", cancelAtEndOfPeriod=" + cancelAtEndOfPeriod
                 + ", currentBillingAmountInCents=" + currentBillingAmountInCents + ", customer="
-                + customer + ", accountBalances=" + accountBalances + "]";
+                + customer + ", accountBalances=" + accountBalances + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/GetOneTimeTokenPaymentProfile.java b/src/main/java/com/maxio/advancedbilling/models/GetOneTimeTokenPaymentProfile.java
index 4e7509be..5b9245c8 100644
--- a/src/main/java/com/maxio/advancedbilling/models/GetOneTimeTokenPaymentProfile.java
+++ b/src/main/java/com/maxio/advancedbilling/models/GetOneTimeTokenPaymentProfile.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for GetOneTimeTokenPaymentProfile type.
  */
-public class GetOneTimeTokenPaymentProfile {
+public class GetOneTimeTokenPaymentProfile
+        extends BaseModel {
     private OptionalNullable<String> id;
     private String firstName;
     private String lastName;
@@ -638,7 +640,7 @@ public String toString() {
                 + disabled + ", siteGatewaySettingId=" + siteGatewaySettingId + ", id=" + id
                 + ", customerId=" + customerId + ", billingAddress2=" + billingAddress2
                 + ", customerVaultToken=" + customerVaultToken + ", gatewayHandle=" + gatewayHandle
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/GetOneTimeTokenRequest.java b/src/main/java/com/maxio/advancedbilling/models/GetOneTimeTokenRequest.java
index 6c3f01b5..85fc83c3 100644
--- a/src/main/java/com/maxio/advancedbilling/models/GetOneTimeTokenRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/GetOneTimeTokenRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for GetOneTimeTokenRequest type.
  */
-public class GetOneTimeTokenRequest {
+public class GetOneTimeTokenRequest
+        extends BaseModel {
     private GetOneTimeTokenPaymentProfile paymentProfile;
 
     /**
@@ -54,7 +56,8 @@ public void setPaymentProfile(GetOneTimeTokenPaymentProfile paymentProfile) {
      */
     @Override
     public String toString() {
-        return "GetOneTimeTokenRequest [" + "paymentProfile=" + paymentProfile + "]";
+        return "GetOneTimeTokenRequest [" + "paymentProfile=" + paymentProfile
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/GroupBilling.java b/src/main/java/com/maxio/advancedbilling/models/GroupBilling.java
index ae29861c..23f6374b 100644
--- a/src/main/java/com/maxio/advancedbilling/models/GroupBilling.java
+++ b/src/main/java/com/maxio/advancedbilling/models/GroupBilling.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for GroupBilling type.
  */
-public class GroupBilling {
+public class GroupBilling
+        extends BaseModel {
     private Boolean accrue;
     private Boolean alignDate;
     private Boolean prorate;
@@ -118,7 +120,7 @@ public void setProrate(Boolean prorate) {
     @Override
     public String toString() {
         return "GroupBilling [" + "accrue=" + accrue + ", alignDate=" + alignDate + ", prorate="
-                + prorate + "]";
+                + prorate + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/GroupSettings.java b/src/main/java/com/maxio/advancedbilling/models/GroupSettings.java
index 1ebebb8b..885d4995 100644
--- a/src/main/java/com/maxio/advancedbilling/models/GroupSettings.java
+++ b/src/main/java/com/maxio/advancedbilling/models/GroupSettings.java
@@ -11,11 +11,13 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for GroupSettings type.
  */
-public class GroupSettings {
+public class GroupSettings
+        extends BaseModel {
     private GroupTarget target;
     private GroupBilling billing;
 
@@ -98,7 +100,8 @@ public void setBilling(GroupBilling billing) {
      */
     @Override
     public String toString() {
-        return "GroupSettings [" + "target=" + target + ", billing=" + billing + "]";
+        return "GroupSettings [" + "target=" + target + ", billing=" + billing
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/GroupTarget.java b/src/main/java/com/maxio/advancedbilling/models/GroupTarget.java
index d6df2f65..03099cd4 100644
--- a/src/main/java/com/maxio/advancedbilling/models/GroupTarget.java
+++ b/src/main/java/com/maxio/advancedbilling/models/GroupTarget.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for GroupTarget type.
  */
-public class GroupTarget {
+public class GroupTarget
+        extends BaseModel {
     private GroupTargetType type;
     private Integer id;
 
@@ -84,7 +86,8 @@ public void setId(Integer id) {
      */
     @Override
     public String toString() {
-        return "GroupTarget [" + "type=" + type + ", id=" + id + "]";
+        return "GroupTarget [" + "type=" + type + ", id=" + id + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Invoice.java b/src/main/java/com/maxio/advancedbilling/models/Invoice.java
index 2581e68e..fc9b2076 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Invoice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Invoice.java
@@ -12,6 +12,7 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.LocalDate;
 import java.time.ZonedDateTime;
@@ -20,7 +21,8 @@
 /**
  * This is a model class for Invoice type.
  */
-public class Invoice {
+public class Invoice
+        extends BaseModel {
     private Long id;
     private String uid;
     private Integer siteId;
@@ -1630,7 +1632,8 @@ public String toString() {
                 + lineItems + ", discounts=" + discounts + ", taxes=" + taxes + ", credits="
                 + credits + ", refunds=" + refunds + ", payments=" + payments + ", customFields="
                 + customFields + ", displaySettings=" + displaySettings + ", publicUrl=" + publicUrl
-                + ", previousBalanceData=" + previousBalanceData + "]";
+                + ", previousBalanceData=" + previousBalanceData + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceAddress.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceAddress.java
index d0cd6b52..02cc4344 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceAddress.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceAddress.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for InvoiceAddress type.
  */
-public class InvoiceAddress {
+public class InvoiceAddress
+        extends BaseModel {
     private OptionalNullable<String> street;
     private OptionalNullable<String> line2;
     private OptionalNullable<String> city;
@@ -291,7 +293,8 @@ public void unsetCountry() {
     @Override
     public String toString() {
         return "InvoiceAddress [" + "street=" + street + ", line2=" + line2 + ", city=" + city
-                + ", state=" + state + ", zip=" + zip + ", country=" + country + "]";
+                + ", state=" + state + ", zip=" + zip + ", country=" + country
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceBalanceItem.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceBalanceItem.java
index f1c5c05d..10b21d33 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceBalanceItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceBalanceItem.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for InvoiceBalanceItem type.
  */
-public class InvoiceBalanceItem {
+public class InvoiceBalanceItem
+        extends BaseModel {
     private String uid;
     private String number;
     private String outstandingAmount;
@@ -103,7 +105,7 @@ public void setOutstandingAmount(String outstandingAmount) {
     @Override
     public String toString() {
         return "InvoiceBalanceItem [" + "uid=" + uid + ", number=" + number + ", outstandingAmount="
-                + outstandingAmount + "]";
+                + outstandingAmount + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceCredit.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceCredit.java
index 1d9922c3..e0e56789 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceCredit.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceCredit.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for InvoiceCredit type.
  */
-public class InvoiceCredit {
+public class InvoiceCredit
+        extends BaseModel {
     private String uid;
     private String creditNoteNumber;
     private String creditNoteUid;
@@ -203,7 +205,7 @@ public String toString() {
         return "InvoiceCredit [" + "uid=" + uid + ", creditNoteNumber=" + creditNoteNumber
                 + ", creditNoteUid=" + creditNoteUid + ", transactionTime=" + transactionTime
                 + ", memo=" + memo + ", originalAmount=" + originalAmount + ", appliedAmount="
-                + appliedAmount + "]";
+                + appliedAmount + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceCustomField.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceCustomField.java
index 572d3944..7d8c5425 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceCustomField.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceCustomField.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for InvoiceCustomField type.
  */
-public class InvoiceCustomField {
+public class InvoiceCustomField
+        extends BaseModel {
     private Integer ownerId;
     private CustomFieldOwner ownerType;
     private String name;
@@ -149,7 +151,8 @@ public void setMetadatumId(Integer metadatumId) {
     @Override
     public String toString() {
         return "InvoiceCustomField [" + "ownerId=" + ownerId + ", ownerType=" + ownerType
-                + ", name=" + name + ", value=" + value + ", metadatumId=" + metadatumId + "]";
+                + ", name=" + name + ", value=" + value + ", metadatumId=" + metadatumId
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceCustomer.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceCustomer.java
index 67797c17..f5255b16 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceCustomer.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceCustomer.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for InvoiceCustomer type.
  */
-public class InvoiceCustomer {
+public class InvoiceCustomer
+        extends BaseModel {
     private OptionalNullable<Integer> chargifyId;
     private String firstName;
     private String lastName;
@@ -285,7 +287,8 @@ public void unsetReference() {
     public String toString() {
         return "InvoiceCustomer [" + "chargifyId=" + chargifyId + ", firstName=" + firstName
                 + ", lastName=" + lastName + ", organization=" + organization + ", email=" + email
-                + ", vatNumber=" + vatNumber + ", reference=" + reference + "]";
+                + ", vatNumber=" + vatNumber + ", reference=" + reference
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceDiscount.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceDiscount.java
index 00704e1b..a37d0a0d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceDiscount.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceDiscount.java
@@ -10,13 +10,15 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.util.List;
 
 /**
  * This is a model class for InvoiceDiscount type.
  */
-public class InvoiceDiscount {
+public class InvoiceDiscount
+        extends BaseModel {
     private String uid;
     private String title;
     private OptionalNullable<String> description;
@@ -368,7 +370,7 @@ public String toString() {
                 + sourceId + ", discountType=" + discountType + ", percentage=" + percentage
                 + ", eligibleAmount=" + eligibleAmount + ", discountAmount=" + discountAmount
                 + ", transactionId=" + transactionId + ", lineItemBreakouts=" + lineItemBreakouts
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceDiscountBreakout.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceDiscountBreakout.java
index ecd22903..c7e5eb69 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceDiscountBreakout.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceDiscountBreakout.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for InvoiceDiscountBreakout type.
  */
-public class InvoiceDiscountBreakout {
+public class InvoiceDiscountBreakout
+        extends BaseModel {
     private String uid;
     private String eligibleAmount;
     private String discountAmount;
@@ -103,7 +105,8 @@ public void setDiscountAmount(String discountAmount) {
     @Override
     public String toString() {
         return "InvoiceDiscountBreakout [" + "uid=" + uid + ", eligibleAmount=" + eligibleAmount
-                + ", discountAmount=" + discountAmount + "]";
+                + ", discountAmount=" + discountAmount + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceDisplaySettings.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceDisplaySettings.java
index 9e33dccc..986efd72 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceDisplaySettings.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceDisplaySettings.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for InvoiceDisplaySettings type.
  */
-public class InvoiceDisplaySettings {
+public class InvoiceDisplaySettings
+        extends BaseModel {
     private Boolean hideZeroSubtotalLines;
     private Boolean includeDiscountsOnLines;
 
@@ -80,7 +82,8 @@ public void setIncludeDiscountsOnLines(Boolean includeDiscountsOnLines) {
     @Override
     public String toString() {
         return "InvoiceDisplaySettings [" + "hideZeroSubtotalLines=" + hideZeroSubtotalLines
-                + ", includeDiscountsOnLines=" + includeDiscountsOnLines + "]";
+                + ", includeDiscountsOnLines=" + includeDiscountsOnLines + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceEvent.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceEvent.java
index 1938d69a..6b1c9ea1 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceEvent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceEvent.java
@@ -13,12 +13,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
 import com.maxio.advancedbilling.models.containers.InvoiceEventEventData;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for InvoiceEvent type.
  */
-public class InvoiceEvent {
+public class InvoiceEvent
+        extends BaseModel {
     private Integer id;
     private InvoiceEventType eventType;
     private InvoiceEventEventData eventData;
@@ -162,7 +164,8 @@ public void setInvoice(Invoice invoice) {
     @Override
     public String toString() {
         return "InvoiceEvent [" + "id=" + id + ", eventType=" + eventType + ", eventData="
-                + eventData + ", timestamp=" + timestamp + ", invoice=" + invoice + "]";
+                + eventData + ", timestamp=" + timestamp + ", invoice=" + invoice
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceEventData.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceEventData.java
index b9ec16b1..07ecd6f3 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceEventData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceEventData.java
@@ -13,6 +13,7 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
 import com.maxio.advancedbilling.models.containers.InvoiceEventDataPaymentMethod;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 import java.util.List;
@@ -20,7 +21,8 @@
 /**
  * This is a model class for InvoiceEventData type.
  */
-public class InvoiceEventData {
+public class InvoiceEventData
+        extends BaseModel {
     private String uid;
     private String creditNoteNumber;
     private String creditNoteUid;
@@ -989,7 +991,8 @@ public String toString() {
                 + ", dueAmount=" + dueAmount + ", totalAmount=" + totalAmount + ", applyCredit="
                 + applyCredit + ", creditNoteAttributes=" + creditNoteAttributes + ", paymentId="
                 + paymentId + ", refundAmount=" + refundAmount + ", refundId=" + refundId
-                + ", isAdvanceInvoice=" + isAdvanceInvoice + ", reason=" + reason + "]";
+                + ", isAdvanceInvoice=" + isAdvanceInvoice + ", reason=" + reason
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceEventPayment.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceEventPayment.java
index 2756759e..c49a7e39 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceEventPayment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceEventPayment.java
@@ -12,6 +12,7 @@
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.annotation.JsonTypeInfo;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
@@ -24,7 +25,8 @@
         defaultImpl = InvoiceEventPayment.class,
         visible = true)
 @JsonInclude(Include.ALWAYS)
-public class InvoiceEventPayment {
+public class InvoiceEventPayment
+        extends BaseModel {
     private String type;
     private String maskedAccountNumber;
     private String maskedRoutingNumber;
@@ -383,7 +385,8 @@ public String toString() {
                 + maskedAccountNumber + ", maskedRoutingNumber=" + maskedRoutingNumber
                 + ", cardBrand=" + cardBrand + ", cardExpiration=" + cardExpiration + ", lastFour="
                 + lastFour + ", maskedCardNumber=" + maskedCardNumber + ", details=" + details
-                + ", kind=" + kind + ", memo=" + memo + ", email=" + email + "]";
+                + ", kind=" + kind + ", memo=" + memo + ", email=" + email
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceEventPayment1.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceEventPayment1.java
index 3fda0c74..4ee78d08 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceEventPayment1.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceEventPayment1.java
@@ -12,6 +12,7 @@
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.annotation.JsonTypeInfo;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
@@ -24,7 +25,8 @@
         defaultImpl = InvoiceEventPayment1.class,
         visible = true)
 @JsonInclude(Include.ALWAYS)
-public class InvoiceEventPayment1 {
+public class InvoiceEventPayment1
+        extends BaseModel {
     private String type;
     private String maskedAccountNumber;
     private String maskedRoutingNumber;
@@ -341,7 +343,8 @@ public String toString() {
                 + ", maskedRoutingNumber=" + maskedRoutingNumber + ", cardBrand=" + cardBrand
                 + ", maskedCardNumber=" + maskedCardNumber + ", details=" + details + ", kind="
                 + kind + ", memo=" + memo + ", email=" + email + ", type=" + type
-                + ", cardExpiration=" + cardExpiration + ", lastFour=" + lastFour + "]";
+                + ", cardExpiration=" + cardExpiration + ", lastFour=" + lastFour
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceIssued.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceIssued.java
index e1a8bb02..8c80f869 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceIssued.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceIssued.java
@@ -13,13 +13,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.LocalDate;
 import java.util.List;
 
 /**
  * This is a model class for InvoiceIssued type.
  */
-public class InvoiceIssued {
+public class InvoiceIssued
+        extends BaseModel {
     private String uid;
     private String number;
     private String role;
@@ -381,7 +383,8 @@ public String toString() {
                 + ", dueAmount=" + dueAmount + ", paidAmount=" + paidAmount + ", taxAmount="
                 + taxAmount + ", refundAmount=" + refundAmount + ", totalAmount=" + totalAmount
                 + ", statusAmount=" + statusAmount + ", productName=" + productName
-                + ", consolidationLevel=" + consolidationLevel + ", lineItems=" + lineItems + "]";
+                + ", consolidationLevel=" + consolidationLevel + ", lineItems=" + lineItems
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceLineItem.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceLineItem.java
index 50d89e8d..a671b52d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceLineItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceLineItem.java
@@ -13,13 +13,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
 import com.maxio.advancedbilling.models.containers.InvoiceLineItemComponentCostData2;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.LocalDate;
 
 /**
  * This is a model class for InvoiceLineItem type.
  */
-public class InvoiceLineItem {
+public class InvoiceLineItem
+        extends BaseModel {
     private String uid;
     private String title;
     private String description;
@@ -816,7 +818,8 @@ public String toString() {
                 + ", productVersion=" + productVersion + ", componentId=" + componentId
                 + ", pricePointId=" + pricePointId + ", hide=" + hide + ", componentCostData="
                 + componentCostData + ", productPricePointId=" + productPricePointId
-                + ", customItem=" + customItem + ", kind=" + kind + "]";
+                + ", customItem=" + customItem + ", kind=" + kind + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceLineItemComponentCostData.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceLineItemComponentCostData.java
index 46878cb1..eaaf9a52 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceLineItemComponentCostData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceLineItemComponentCostData.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for InvoiceLineItemComponentCostData type.
  */
-public class InvoiceLineItemComponentCostData {
+public class InvoiceLineItemComponentCostData
+        extends BaseModel {
     private List<ComponentCostData> rates;
 
     /**
@@ -57,7 +59,8 @@ public void setRates(List<ComponentCostData> rates) {
      */
     @Override
     public String toString() {
-        return "InvoiceLineItemComponentCostData [" + "rates=" + rates + "]";
+        return "InvoiceLineItemComponentCostData [" + "rates=" + rates + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceLineItemEventData.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceLineItemEventData.java
index 436b5611..1c0117ec 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceLineItemEventData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceLineItemEventData.java
@@ -10,13 +10,15 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.util.List;
 
 /**
  * This is a model class for InvoiceLineItemEventData type.
  */
-public class InvoiceLineItemEventData {
+public class InvoiceLineItemEventData
+        extends BaseModel {
     private String uid;
     private String title;
     private String description;
@@ -688,7 +690,7 @@ public String toString() {
                 + taxAmount + ", productId=" + productId + ", productPricePointId="
                 + productPricePointId + ", pricePointId=" + pricePointId + ", componentId="
                 + componentId + ", billingScheduleItemId=" + billingScheduleItemId + ", customItem="
-                + customItem + "]";
+                + customItem + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceLineItemPricingDetail.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceLineItemPricingDetail.java
index 9969a821..bd825eb1 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceLineItemPricingDetail.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceLineItemPricingDetail.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for InvoiceLineItemPricingDetail type.
  */
-public class InvoiceLineItemPricingDetail {
+public class InvoiceLineItemPricingDetail
+        extends BaseModel {
     private String label;
     private String amount;
 
@@ -79,7 +81,8 @@ public void setAmount(String amount) {
      */
     @Override
     public String toString() {
-        return "InvoiceLineItemPricingDetail [" + "label=" + label + ", amount=" + amount + "]";
+        return "InvoiceLineItemPricingDetail [" + "label=" + label + ", amount=" + amount
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoicePayer.java b/src/main/java/com/maxio/advancedbilling/models/InvoicePayer.java
index a0b3b964..ed2fa487 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoicePayer.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoicePayer.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for InvoicePayer type.
  */
-public class InvoicePayer {
+public class InvoicePayer
+        extends BaseModel {
     private Integer chargifyId;
     private String firstName;
     private String lastName;
@@ -228,7 +230,8 @@ public void unsetVatNumber() {
     public String toString() {
         return "InvoicePayer [" + "chargifyId=" + chargifyId + ", firstName=" + firstName
                 + ", lastName=" + lastName + ", organization=" + organization + ", email=" + email
-                + ", vatNumber=" + vatNumber + "]";
+                + ", vatNumber=" + vatNumber + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoicePayerChange.java b/src/main/java/com/maxio/advancedbilling/models/InvoicePayerChange.java
index 6958ae58..a72a8708 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoicePayerChange.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoicePayerChange.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for InvoicePayerChange type.
  */
-public class InvoicePayerChange {
+public class InvoicePayerChange
+        extends BaseModel {
     private String firstName;
     private String lastName;
     private String organization;
@@ -126,7 +128,8 @@ public void setEmail(String email) {
     @Override
     public String toString() {
         return "InvoicePayerChange [" + "firstName=" + firstName + ", lastName=" + lastName
-                + ", organization=" + organization + ", email=" + email + "]";
+                + ", organization=" + organization + ", email=" + email + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoicePayment.java b/src/main/java/com/maxio/advancedbilling/models/InvoicePayment.java
index 5def7aeb..8efbac69 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoicePayment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoicePayment.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for InvoicePayment type.
  */
-public class InvoicePayment {
+public class InvoicePayment
+        extends BaseModel {
     private ZonedDateTime transactionTime;
     private String memo;
     private String originalAmount;
@@ -341,7 +343,7 @@ public String toString() {
                 + ", paymentMethod=" + paymentMethod + ", transactionId=" + transactionId
                 + ", prepayment=" + prepayment + ", gatewayHandle=" + gatewayHandle
                 + ", gatewayUsed=" + gatewayUsed + ", gatewayTransactionId=" + gatewayTransactionId
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoicePaymentApplication.java b/src/main/java/com/maxio/advancedbilling/models/InvoicePaymentApplication.java
index cdf3cfc6..54b3709c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoicePaymentApplication.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoicePaymentApplication.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for InvoicePaymentApplication type.
  */
-public class InvoicePaymentApplication {
+public class InvoicePaymentApplication
+        extends BaseModel {
     private String invoiceUid;
     private String applicationUid;
     private String appliedAmount;
@@ -113,7 +115,8 @@ public void setAppliedAmount(String appliedAmount) {
     @Override
     public String toString() {
         return "InvoicePaymentApplication [" + "invoiceUid=" + invoiceUid + ", applicationUid="
-                + applicationUid + ", appliedAmount=" + appliedAmount + "]";
+                + applicationUid + ", appliedAmount=" + appliedAmount + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoicePaymentMethod.java b/src/main/java/com/maxio/advancedbilling/models/InvoicePaymentMethod.java
index 319ba38b..9049f6cd 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoicePaymentMethod.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoicePaymentMethod.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for InvoicePaymentMethod type.
  */
-public class InvoicePaymentMethod {
+public class InvoicePaymentMethod
+        extends BaseModel {
     private String details;
     private String kind;
     private String memo;
@@ -263,7 +265,7 @@ public String toString() {
         return "InvoicePaymentMethod [" + "details=" + details + ", kind=" + kind + ", memo=" + memo
                 + ", type=" + type + ", cardBrand=" + cardBrand + ", cardExpiration="
                 + cardExpiration + ", lastFour=" + lastFour + ", maskedCardNumber="
-                + maskedCardNumber + "]";
+                + maskedCardNumber + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoicePrePayment.java b/src/main/java/com/maxio/advancedbilling/models/InvoicePrePayment.java
index 84c1ce15..ac267dd7 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoicePrePayment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoicePrePayment.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for InvoicePrePayment type.
  */
-public class InvoicePrePayment {
+public class InvoicePrePayment
+        extends BaseModel {
     private Integer subscriptionId;
     private Long amountInCents;
     private Long endingBalanceInCents;
@@ -111,7 +113,8 @@ public void setEndingBalanceInCents(Long endingBalanceInCents) {
     @Override
     public String toString() {
         return "InvoicePrePayment [" + "subscriptionId=" + subscriptionId + ", amountInCents="
-                + amountInCents + ", endingBalanceInCents=" + endingBalanceInCents + "]";
+                + amountInCents + ", endingBalanceInCents=" + endingBalanceInCents
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoicePreviousBalance.java b/src/main/java/com/maxio/advancedbilling/models/InvoicePreviousBalance.java
index 8b2bd477..edcd8712 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoicePreviousBalance.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoicePreviousBalance.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 import java.util.List;
 
 /**
  * This is a model class for InvoicePreviousBalance type.
  */
-public class InvoicePreviousBalance {
+public class InvoicePreviousBalance
+        extends BaseModel {
     private ZonedDateTime capturedAt;
     private List<InvoiceBalanceItem> invoices;
 
@@ -87,7 +89,7 @@ public void setInvoices(List<InvoiceBalanceItem> invoices) {
     @Override
     public String toString() {
         return "InvoicePreviousBalance [" + "capturedAt=" + capturedAt + ", invoices=" + invoices
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceRefund.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceRefund.java
index 9593974c..2f51927f 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceRefund.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceRefund.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for InvoiceRefund type.
  */
-public class InvoiceRefund {
+public class InvoiceRefund
+        extends BaseModel {
     private Integer transactionId;
     private Integer paymentId;
     private String memo;
@@ -284,7 +286,8 @@ public String toString() {
         return "InvoiceRefund [" + "transactionId=" + transactionId + ", paymentId=" + paymentId
                 + ", memo=" + memo + ", originalAmount=" + originalAmount + ", appliedAmount="
                 + appliedAmount + ", gatewayTransactionId=" + gatewayTransactionId
-                + ", gatewayUsed=" + gatewayUsed + ", gatewayHandle=" + gatewayHandle + "]";
+                + ", gatewayUsed=" + gatewayUsed + ", gatewayHandle=" + gatewayHandle
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceResponse.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceResponse.java
index 70bae268..24a66589 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for InvoiceResponse type.
  */
-public class InvoiceResponse {
+public class InvoiceResponse
+        extends BaseModel {
     private Invoice invoice;
 
     /**
@@ -54,7 +56,8 @@ public void setInvoice(Invoice invoice) {
      */
     @Override
     public String toString() {
-        return "InvoiceResponse [" + "invoice=" + invoice + "]";
+        return "InvoiceResponse [" + "invoice=" + invoice + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceSeller.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceSeller.java
index c4971aff..ebaaf379 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceSeller.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceSeller.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for InvoiceSeller type.
  */
-public class InvoiceSeller {
+public class InvoiceSeller
+        extends BaseModel {
     private String name;
     private InvoiceAddress address;
     private String phone;
@@ -160,7 +162,8 @@ public void unsetLogoUrl() {
     @Override
     public String toString() {
         return "InvoiceSeller [" + "name=" + name + ", address=" + address + ", phone=" + phone
-                + ", logoUrl=" + logoUrl + "]";
+                + ", logoUrl=" + logoUrl + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceTax.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceTax.java
index 76a914f9..5a178ccc 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceTax.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceTax.java
@@ -10,13 +10,15 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.util.List;
 
 /**
  * This is a model class for InvoiceTax type.
  */
-public class InvoiceTax {
+public class InvoiceTax
+        extends BaseModel {
     private String uid;
     private String title;
     private OptionalNullable<String> description;
@@ -344,7 +346,8 @@ public String toString() {
                 + ", sourceType=" + sourceType + ", sourceId=" + sourceId + ", percentage="
                 + percentage + ", taxableAmount=" + taxableAmount + ", taxAmount=" + taxAmount
                 + ", transactionId=" + transactionId + ", lineItemBreakouts=" + lineItemBreakouts
-                + ", taxComponentBreakouts=" + taxComponentBreakouts + "]";
+                + ", taxComponentBreakouts=" + taxComponentBreakouts + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceTaxBreakout.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceTaxBreakout.java
index ed115d75..ee6a6fcb 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceTaxBreakout.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceTaxBreakout.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for InvoiceTaxBreakout type.
  */
-public class InvoiceTaxBreakout {
+public class InvoiceTaxBreakout
+        extends BaseModel {
     private String uid;
     private String taxableAmount;
     private String taxAmount;
@@ -126,7 +128,8 @@ public void setTaxExemptAmount(String taxExemptAmount) {
     @Override
     public String toString() {
         return "InvoiceTaxBreakout [" + "uid=" + uid + ", taxableAmount=" + taxableAmount
-                + ", taxAmount=" + taxAmount + ", taxExemptAmount=" + taxExemptAmount + "]";
+                + ", taxAmount=" + taxAmount + ", taxExemptAmount=" + taxExemptAmount
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/InvoiceTaxComponentBreakout.java b/src/main/java/com/maxio/advancedbilling/models/InvoiceTaxComponentBreakout.java
index fe47c33e..2964875c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/InvoiceTaxComponentBreakout.java
+++ b/src/main/java/com/maxio/advancedbilling/models/InvoiceTaxComponentBreakout.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for InvoiceTaxComponentBreakout type.
  */
-public class InvoiceTaxComponentBreakout {
+public class InvoiceTaxComponentBreakout
+        extends BaseModel {
     private Integer taxRuleId;
     private String percentage;
     private String countryCode;
@@ -127,7 +129,7 @@ public void setSubdivisionCode(String subdivisionCode) {
     public String toString() {
         return "InvoiceTaxComponentBreakout [" + "taxRuleId=" + taxRuleId + ", percentage="
                 + percentage + ", countryCode=" + countryCode + ", subdivisionCode="
-                + subdivisionCode + "]";
+                + subdivisionCode + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/IssueAdvanceInvoiceRequest.java b/src/main/java/com/maxio/advancedbilling/models/IssueAdvanceInvoiceRequest.java
index 32683bce..ee3ebdae 100644
--- a/src/main/java/com/maxio/advancedbilling/models/IssueAdvanceInvoiceRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/IssueAdvanceInvoiceRequest.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for IssueAdvanceInvoiceRequest type.
  */
-public class IssueAdvanceInvoiceRequest {
+public class IssueAdvanceInvoiceRequest
+        extends BaseModel {
     private Boolean force;
 
     /**
@@ -56,7 +58,8 @@ public void setForce(Boolean force) {
      */
     @Override
     public String toString() {
-        return "IssueAdvanceInvoiceRequest [" + "force=" + force + "]";
+        return "IssueAdvanceInvoiceRequest [" + "force=" + force + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/IssueInvoiceEventData.java b/src/main/java/com/maxio/advancedbilling/models/IssueInvoiceEventData.java
index 36ce2cda..e124322e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/IssueInvoiceEventData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/IssueInvoiceEventData.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for IssueInvoiceEventData type.
  */
-public class IssueInvoiceEventData {
+public class IssueInvoiceEventData
+        extends BaseModel {
     private InvoiceConsolidationLevel consolidationLevel;
     private InvoiceStatus fromStatus;
     private InvoiceStatus toStatus;
@@ -177,7 +179,8 @@ public void setTotalAmount(String totalAmount) {
     public String toString() {
         return "IssueInvoiceEventData [" + "consolidationLevel=" + consolidationLevel
                 + ", fromStatus=" + fromStatus + ", toStatus=" + toStatus + ", dueAmount="
-                + dueAmount + ", totalAmount=" + totalAmount + "]";
+                + dueAmount + ", totalAmount=" + totalAmount + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/IssueInvoiceRequest.java b/src/main/java/com/maxio/advancedbilling/models/IssueInvoiceRequest.java
index 3be98e8d..e4f9f9f1 100644
--- a/src/main/java/com/maxio/advancedbilling/models/IssueInvoiceRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/IssueInvoiceRequest.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for IssueInvoiceRequest type.
  */
-public class IssueInvoiceRequest {
+public class IssueInvoiceRequest
+        extends BaseModel {
     private FailedPaymentAction onFailedPayment;
 
     /**
@@ -75,7 +77,8 @@ public void setOnFailedPayment(FailedPaymentAction onFailedPayment) {
      */
     @Override
     public String toString() {
-        return "IssueInvoiceRequest [" + "onFailedPayment=" + onFailedPayment + "]";
+        return "IssueInvoiceRequest [" + "onFailedPayment=" + onFailedPayment
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/IssueServiceCredit.java b/src/main/java/com/maxio/advancedbilling/models/IssueServiceCredit.java
index 47deb16f..22de7346 100644
--- a/src/main/java/com/maxio/advancedbilling/models/IssueServiceCredit.java
+++ b/src/main/java/com/maxio/advancedbilling/models/IssueServiceCredit.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.IssueServiceCreditAmount;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for IssueServiceCredit type.
  */
-public class IssueServiceCredit {
+public class IssueServiceCredit
+        extends BaseModel {
     private IssueServiceCreditAmount amount;
     private String memo;
 
@@ -77,7 +79,8 @@ public void setMemo(String memo) {
      */
     @Override
     public String toString() {
-        return "IssueServiceCredit [" + "amount=" + amount + ", memo=" + memo + "]";
+        return "IssueServiceCredit [" + "amount=" + amount + ", memo=" + memo
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/IssueServiceCreditRequest.java b/src/main/java/com/maxio/advancedbilling/models/IssueServiceCreditRequest.java
index ae942e1f..fc9595e5 100644
--- a/src/main/java/com/maxio/advancedbilling/models/IssueServiceCreditRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/IssueServiceCreditRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for IssueServiceCreditRequest type.
  */
-public class IssueServiceCreditRequest {
+public class IssueServiceCreditRequest
+        extends BaseModel {
     private IssueServiceCredit serviceCredit;
 
     /**
@@ -54,7 +56,8 @@ public void setServiceCredit(IssueServiceCredit serviceCredit) {
      */
     @Override
     public String toString() {
-        return "IssueServiceCreditRequest [" + "serviceCredit=" + serviceCredit + "]";
+        return "IssueServiceCreditRequest [" + "serviceCredit=" + serviceCredit
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ItemPricePointChanged.java b/src/main/java/com/maxio/advancedbilling/models/ItemPricePointChanged.java
index a569d838..876cab62 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ItemPricePointChanged.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ItemPricePointChanged.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ItemPricePointChanged type.
  */
-public class ItemPricePointChanged {
+public class ItemPricePointChanged
+        extends BaseModel {
     private int itemId;
     private String itemType;
     private String itemHandle;
@@ -169,7 +171,8 @@ public void setCurrentPricePoint(ItemPricePointData currentPricePoint) {
     public String toString() {
         return "ItemPricePointChanged [" + "itemId=" + itemId + ", itemType=" + itemType
                 + ", itemHandle=" + itemHandle + ", itemName=" + itemName + ", previousPricePoint="
-                + previousPricePoint + ", currentPricePoint=" + currentPricePoint + "]";
+                + previousPricePoint + ", currentPricePoint=" + currentPricePoint
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ItemPricePointData.java b/src/main/java/com/maxio/advancedbilling/models/ItemPricePointData.java
index e9ead59c..81fb5a77 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ItemPricePointData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ItemPricePointData.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ItemPricePointData type.
  */
-public class ItemPricePointData {
+public class ItemPricePointData
+        extends BaseModel {
     private Integer id;
     private String handle;
     private String name;
@@ -102,7 +104,8 @@ public void setName(String name) {
      */
     @Override
     public String toString() {
-        return "ItemPricePointData [" + "id=" + id + ", handle=" + handle + ", name=" + name + "]";
+        return "ItemPricePointData [" + "id=" + id + ", handle=" + handle + ", name=" + name
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListComponentsPricePointsResponse.java b/src/main/java/com/maxio/advancedbilling/models/ListComponentsPricePointsResponse.java
index 54460350..7fbe8101 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListComponentsPricePointsResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListComponentsPricePointsResponse.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ListComponentsPricePointsResponse type.
  */
-public class ListComponentsPricePointsResponse {
+public class ListComponentsPricePointsResponse
+        extends BaseModel {
     private List<ComponentPricePoint> pricePoints;
 
     /**
@@ -55,7 +57,8 @@ public void setPricePoints(List<ComponentPricePoint> pricePoints) {
      */
     @Override
     public String toString() {
-        return "ListComponentsPricePointsResponse [" + "pricePoints=" + pricePoints + "]";
+        return "ListComponentsPricePointsResponse [" + "pricePoints=" + pricePoints
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListCreditNotesResponse.java b/src/main/java/com/maxio/advancedbilling/models/ListCreditNotesResponse.java
index be698667..206dfc5e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListCreditNotesResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListCreditNotesResponse.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ListCreditNotesResponse type.
  */
-public class ListCreditNotesResponse {
+public class ListCreditNotesResponse
+        extends BaseModel {
     private List<CreditNote> creditNotes;
 
     /**
@@ -55,7 +57,8 @@ public void setCreditNotes(List<CreditNote> creditNotes) {
      */
     @Override
     public String toString() {
-        return "ListCreditNotesResponse [" + "creditNotes=" + creditNotes + "]";
+        return "ListCreditNotesResponse [" + "creditNotes=" + creditNotes
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListInvoiceEventsResponse.java b/src/main/java/com/maxio/advancedbilling/models/ListInvoiceEventsResponse.java
index faf5b6e8..191b1d61 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListInvoiceEventsResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListInvoiceEventsResponse.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ListInvoiceEventsResponse type.
  */
-public class ListInvoiceEventsResponse {
+public class ListInvoiceEventsResponse
+        extends BaseModel {
     private List<InvoiceEvent> events;
     private Integer page;
     private Integer perPage;
@@ -127,7 +129,8 @@ public void setTotalPages(Integer totalPages) {
     @Override
     public String toString() {
         return "ListInvoiceEventsResponse [" + "events=" + events + ", page=" + page + ", perPage="
-                + perPage + ", totalPages=" + totalPages + "]";
+                + perPage + ", totalPages=" + totalPages + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListInvoicesResponse.java b/src/main/java/com/maxio/advancedbilling/models/ListInvoicesResponse.java
index 6bbbc930..b3764d17 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListInvoicesResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListInvoicesResponse.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ListInvoicesResponse type.
  */
-public class ListInvoicesResponse {
+public class ListInvoicesResponse
+        extends BaseModel {
     private List<Invoice> invoices;
 
     /**
@@ -55,7 +57,8 @@ public void setInvoices(List<Invoice> invoices) {
      */
     @Override
     public String toString() {
-        return "ListInvoicesResponse [" + "invoices=" + invoices + "]";
+        return "ListInvoicesResponse [" + "invoices=" + invoices + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListMRRResponse.java b/src/main/java/com/maxio/advancedbilling/models/ListMRRResponse.java
index 11d08e54..ea481153 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListMRRResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListMRRResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ListMRRResponse type.
  */
-public class ListMRRResponse {
+public class ListMRRResponse
+        extends BaseModel {
     private ListMRRResponseResult mrr;
 
     /**
@@ -54,7 +56,8 @@ public void setMrr(ListMRRResponseResult mrr) {
      */
     @Override
     public String toString() {
-        return "ListMRRResponse [" + "mrr=" + mrr + "]";
+        return "ListMRRResponse [" + "mrr=" + mrr + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListMRRResponseResult.java b/src/main/java/com/maxio/advancedbilling/models/ListMRRResponseResult.java
index f5254af5..62e2eade 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListMRRResponseResult.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListMRRResponseResult.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ListMRRResponseResult type.
  */
-public class ListMRRResponseResult {
+public class ListMRRResponseResult
+        extends BaseModel {
     private Integer page;
     private Integer perPage;
     private Integer totalPages;
@@ -197,7 +199,8 @@ public void setMovements(List<Movement> movements) {
     public String toString() {
         return "ListMRRResponseResult [" + "page=" + page + ", perPage=" + perPage + ", totalPages="
                 + totalPages + ", totalEntries=" + totalEntries + ", currency=" + currency
-                + ", currencySymbol=" + currencySymbol + ", movements=" + movements + "]";
+                + ", currencySymbol=" + currencySymbol + ", movements=" + movements
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListMetafieldsResponse.java b/src/main/java/com/maxio/advancedbilling/models/ListMetafieldsResponse.java
index 3b0645d8..1d9b5aeb 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListMetafieldsResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListMetafieldsResponse.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ListMetafieldsResponse type.
  */
-public class ListMetafieldsResponse {
+public class ListMetafieldsResponse
+        extends BaseModel {
     private Integer totalCount;
     private Integer currentPage;
     private Integer totalPages;
@@ -151,7 +153,8 @@ public void setMetafields(List<Metafield> metafields) {
     public String toString() {
         return "ListMetafieldsResponse [" + "totalCount=" + totalCount + ", currentPage="
                 + currentPage + ", totalPages=" + totalPages + ", perPage=" + perPage
-                + ", metafields=" + metafields + "]";
+                + ", metafields=" + metafields + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListOffersResponse.java b/src/main/java/com/maxio/advancedbilling/models/ListOffersResponse.java
index 6700f487..43d588b0 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListOffersResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListOffersResponse.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ListOffersResponse type.
  */
-public class ListOffersResponse {
+public class ListOffersResponse
+        extends BaseModel {
     private List<Offer> offers;
 
     /**
@@ -57,7 +59,8 @@ public void setOffers(List<Offer> offers) {
      */
     @Override
     public String toString() {
-        return "ListOffersResponse [" + "offers=" + offers + "]";
+        return "ListOffersResponse [" + "offers=" + offers + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListProductPricePointsResponse.java b/src/main/java/com/maxio/advancedbilling/models/ListProductPricePointsResponse.java
index fbc8ef91..eca4a7f0 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListProductPricePointsResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListProductPricePointsResponse.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ListProductPricePointsResponse type.
  */
-public class ListProductPricePointsResponse {
+public class ListProductPricePointsResponse
+        extends BaseModel {
     private List<ProductPricePoint> pricePoints;
 
     /**
@@ -55,7 +57,8 @@ public void setPricePoints(List<ProductPricePoint> pricePoints) {
      */
     @Override
     public String toString() {
-        return "ListProductPricePointsResponse [" + "pricePoints=" + pricePoints + "]";
+        return "ListProductPricePointsResponse [" + "pricePoints=" + pricePoints
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListProformaInvoicesMeta.java b/src/main/java/com/maxio/advancedbilling/models/ListProformaInvoicesMeta.java
index 62cc376b..9fd7dc20 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListProformaInvoicesMeta.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListProformaInvoicesMeta.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ListProformaInvoicesMeta type.
  */
-public class ListProformaInvoicesMeta {
+public class ListProformaInvoicesMeta
+        extends BaseModel {
     private Integer totalCount;
     private Integer currentPage;
     private Integer totalPages;
@@ -126,7 +128,8 @@ public void setStatusCode(Integer statusCode) {
     @Override
     public String toString() {
         return "ListProformaInvoicesMeta [" + "totalCount=" + totalCount + ", currentPage="
-                + currentPage + ", totalPages=" + totalPages + ", statusCode=" + statusCode + "]";
+                + currentPage + ", totalPages=" + totalPages + ", statusCode=" + statusCode
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListProformaInvoicesResponse.java b/src/main/java/com/maxio/advancedbilling/models/ListProformaInvoicesResponse.java
index 3aa6e107..ac260863 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListProformaInvoicesResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListProformaInvoicesResponse.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ListProformaInvoicesResponse type.
  */
-public class ListProformaInvoicesResponse {
+public class ListProformaInvoicesResponse
+        extends BaseModel {
     private List<ProformaInvoice> proformaInvoices;
     private ListProformaInvoicesMeta meta;
 
@@ -81,7 +83,7 @@ public void setMeta(ListProformaInvoicesMeta meta) {
     @Override
     public String toString() {
         return "ListProformaInvoicesResponse [" + "proformaInvoices=" + proformaInvoices + ", meta="
-                + meta + "]";
+                + meta + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListPublicKeysMeta.java b/src/main/java/com/maxio/advancedbilling/models/ListPublicKeysMeta.java
index 26c84660..59d3ade9 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListPublicKeysMeta.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListPublicKeysMeta.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ListPublicKeysMeta type.
  */
-public class ListPublicKeysMeta {
+public class ListPublicKeysMeta
+        extends BaseModel {
     private Integer totalCount;
     private Integer currentPage;
     private Integer totalPages;
@@ -126,7 +128,8 @@ public void setPerPage(Integer perPage) {
     @Override
     public String toString() {
         return "ListPublicKeysMeta [" + "totalCount=" + totalCount + ", currentPage=" + currentPage
-                + ", totalPages=" + totalPages + ", perPage=" + perPage + "]";
+                + ", totalPages=" + totalPages + ", perPage=" + perPage + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListPublicKeysResponse.java b/src/main/java/com/maxio/advancedbilling/models/ListPublicKeysResponse.java
index 700dcf3e..6040ecdd 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListPublicKeysResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListPublicKeysResponse.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ListPublicKeysResponse type.
  */
-public class ListPublicKeysResponse {
+public class ListPublicKeysResponse
+        extends BaseModel {
     private List<PublicKey> chargifyJsKeys;
     private ListPublicKeysMeta meta;
 
@@ -81,7 +83,7 @@ public void setMeta(ListPublicKeysMeta meta) {
     @Override
     public String toString() {
         return "ListPublicKeysResponse [" + "chargifyJsKeys=" + chargifyJsKeys + ", meta=" + meta
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListSaleRepItem.java b/src/main/java/com/maxio/advancedbilling/models/ListSaleRepItem.java
index 27d2e444..d540b901 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListSaleRepItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListSaleRepItem.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.Map;
 
 /**
  * This is a model class for ListSaleRepItem type.
  */
-public class ListSaleRepItem {
+public class ListSaleRepItem
+        extends BaseModel {
     private Integer id;
     private String fullName;
     private Integer subscriptionsCount;
@@ -150,7 +152,8 @@ public void setTestMode(Boolean testMode) {
     @Override
     public String toString() {
         return "ListSaleRepItem [" + "id=" + id + ", fullName=" + fullName + ", subscriptionsCount="
-                + subscriptionsCount + ", mrrData=" + mrrData + ", testMode=" + testMode + "]";
+                + subscriptionsCount + ", mrrData=" + mrrData + ", testMode=" + testMode
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListSegmentsResponse.java b/src/main/java/com/maxio/advancedbilling/models/ListSegmentsResponse.java
index 8b9ec14e..276397cf 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListSegmentsResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListSegmentsResponse.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ListSegmentsResponse type.
  */
-public class ListSegmentsResponse {
+public class ListSegmentsResponse
+        extends BaseModel {
     private List<Segment> segments;
 
     /**
@@ -57,7 +59,8 @@ public void setSegments(List<Segment> segments) {
      */
     @Override
     public String toString() {
-        return "ListSegmentsResponse [" + "segments=" + segments + "]";
+        return "ListSegmentsResponse [" + "segments=" + segments + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListSubcriptionGroupPrepaymentItem.java b/src/main/java/com/maxio/advancedbilling/models/ListSubcriptionGroupPrepaymentItem.java
index 4b3876d8..863005d1 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListSubcriptionGroupPrepaymentItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListSubcriptionGroupPrepaymentItem.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for ListSubcriptionGroupPrepaymentItem type.
  */
-public class ListSubcriptionGroupPrepaymentItem {
+public class ListSubcriptionGroupPrepaymentItem
+        extends BaseModel {
     private Integer id;
     private String subscriptionGroupUid;
     private Long amountInCents;
@@ -250,7 +252,8 @@ public String toString() {
                 + subscriptionGroupUid + ", amountInCents=" + amountInCents
                 + ", remainingAmountInCents=" + remainingAmountInCents + ", details=" + details
                 + ", external=" + external + ", memo=" + memo + ", paymentType=" + paymentType
-                + ", createdAt=" + createdAt + "]";
+                + ", createdAt=" + createdAt + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionComponentsResponse.java b/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionComponentsResponse.java
index eb984609..0df5d83c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionComponentsResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionComponentsResponse.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ListSubscriptionComponentsResponse type.
  */
-public class ListSubscriptionComponentsResponse {
+public class ListSubscriptionComponentsResponse
+        extends BaseModel {
     private List<SubscriptionComponent> subscriptionsComponents;
 
     /**
@@ -57,7 +59,8 @@ public void setSubscriptionsComponents(List<SubscriptionComponent> subscriptions
     @Override
     public String toString() {
         return "ListSubscriptionComponentsResponse [" + "subscriptionsComponents="
-                + subscriptionsComponents + "]";
+                + subscriptionsComponents + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupPrepayment.java b/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupPrepayment.java
index 7714cda3..a35e4884 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupPrepayment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupPrepayment.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ListSubscriptionGroupPrepayment type.
  */
-public class ListSubscriptionGroupPrepayment {
+public class ListSubscriptionGroupPrepayment
+        extends BaseModel {
     private ListSubcriptionGroupPrepaymentItem prepayment;
 
     /**
@@ -54,7 +56,8 @@ public void setPrepayment(ListSubcriptionGroupPrepaymentItem prepayment) {
      */
     @Override
     public String toString() {
-        return "ListSubscriptionGroupPrepayment [" + "prepayment=" + prepayment + "]";
+        return "ListSubscriptionGroupPrepayment [" + "prepayment=" + prepayment
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupPrepaymentResponse.java b/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupPrepaymentResponse.java
index 14ad981c..8eea15e1 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupPrepaymentResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupPrepaymentResponse.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ListSubscriptionGroupPrepaymentResponse type.
  */
-public class ListSubscriptionGroupPrepaymentResponse {
+public class ListSubscriptionGroupPrepaymentResponse
+        extends BaseModel {
     private List<ListSubscriptionGroupPrepayment> prepayments;
 
     /**
@@ -55,7 +57,8 @@ public void setPrepayments(List<ListSubscriptionGroupPrepayment> prepayments) {
      */
     @Override
     public String toString() {
-        return "ListSubscriptionGroupPrepaymentResponse [" + "prepayments=" + prepayments + "]";
+        return "ListSubscriptionGroupPrepaymentResponse [" + "prepayments=" + prepayments
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupsItem.java b/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupsItem.java
index 8bd03ea1..37737f9a 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupsItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupsItem.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 import java.util.List;
 
 /**
  * This is a model class for ListSubscriptionGroupsItem type.
  */
-public class ListSubscriptionGroupsItem {
+public class ListSubscriptionGroupsItem
+        extends BaseModel {
     private String uid;
     private Integer scheme;
     private Integer customerId;
@@ -275,7 +277,7 @@ public String toString() {
                 + ", subscriptionIds=" + subscriptionIds + ", primarySubscriptionId="
                 + primarySubscriptionId + ", nextAssessmentAt=" + nextAssessmentAt + ", state="
                 + state + ", cancelAtEndOfPeriod=" + cancelAtEndOfPeriod + ", accountBalances="
-                + accountBalances + "]";
+                + accountBalances + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupsMeta.java b/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupsMeta.java
index c7bc3050..7a22d9f3 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupsMeta.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupsMeta.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ListSubscriptionGroupsMeta type.
  */
-public class ListSubscriptionGroupsMeta {
+public class ListSubscriptionGroupsMeta
+        extends BaseModel {
     private Integer currentPage;
     private Integer totalCount;
 
@@ -80,7 +82,7 @@ public void setTotalCount(Integer totalCount) {
     @Override
     public String toString() {
         return "ListSubscriptionGroupsMeta [" + "currentPage=" + currentPage + ", totalCount="
-                + totalCount + "]";
+                + totalCount + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupsResponse.java b/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupsResponse.java
index 2afce26a..ccd1310a 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupsResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ListSubscriptionGroupsResponse.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ListSubscriptionGroupsResponse type.
  */
-public class ListSubscriptionGroupsResponse {
+public class ListSubscriptionGroupsResponse
+        extends BaseModel {
     private List<ListSubscriptionGroupsItem> subscriptionGroups;
     private ListSubscriptionGroupsMeta meta;
 
@@ -81,7 +83,7 @@ public void setMeta(ListSubscriptionGroupsMeta meta) {
     @Override
     public String toString() {
         return "ListSubscriptionGroupsResponse [" + "subscriptionGroups=" + subscriptionGroups
-                + ", meta=" + meta + "]";
+                + ", meta=" + meta + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/MRR.java b/src/main/java/com/maxio/advancedbilling/models/MRR.java
index c63638f7..b49d1756 100644
--- a/src/main/java/com/maxio/advancedbilling/models/MRR.java
+++ b/src/main/java/com/maxio/advancedbilling/models/MRR.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for MRR type.
  */
-public class MRR {
+public class MRR
+        extends BaseModel {
     private Long amountInCents;
     private String amountFormatted;
     private String currency;
@@ -181,7 +183,8 @@ public void setAtTime(ZonedDateTime atTime) {
     public String toString() {
         return "MRR [" + "amountInCents=" + amountInCents + ", amountFormatted=" + amountFormatted
                 + ", currency=" + currency + ", currencySymbol=" + currencySymbol + ", breakouts="
-                + breakouts + ", atTime=" + atTime + "]";
+                + breakouts + ", atTime=" + atTime + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/MRRMovement.java b/src/main/java/com/maxio/advancedbilling/models/MRRMovement.java
index e78a1d7d..2a155caf 100644
--- a/src/main/java/com/maxio/advancedbilling/models/MRRMovement.java
+++ b/src/main/java/com/maxio/advancedbilling/models/MRRMovement.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for MRRMovement type.
  */
-public class MRRMovement {
+public class MRRMovement
+        extends BaseModel {
     private Integer amount;
     private String category;
     private Integer subscriberDelta;
@@ -126,7 +128,8 @@ public void setLeadDelta(Integer leadDelta) {
     @Override
     public String toString() {
         return "MRRMovement [" + "amount=" + amount + ", category=" + category
-                + ", subscriberDelta=" + subscriberDelta + ", leadDelta=" + leadDelta + "]";
+                + ", subscriberDelta=" + subscriberDelta + ", leadDelta=" + leadDelta
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/MRRResponse.java b/src/main/java/com/maxio/advancedbilling/models/MRRResponse.java
index 455cc6a6..43652218 100644
--- a/src/main/java/com/maxio/advancedbilling/models/MRRResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/MRRResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for MRRResponse type.
  */
-public class MRRResponse {
+public class MRRResponse
+        extends BaseModel {
     private MRR mrr;
 
     /**
@@ -54,7 +56,8 @@ public void setMrr(MRR mrr) {
      */
     @Override
     public String toString() {
-        return "MRRResponse [" + "mrr=" + mrr + "]";
+        return "MRRResponse [" + "mrr=" + mrr + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Metadata.java b/src/main/java/com/maxio/advancedbilling/models/Metadata.java
index 75e7c2b9..9afc9da0 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Metadata.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Metadata.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for Metadata type.
  */
-public class Metadata {
+public class Metadata
+        extends BaseModel {
     private OptionalNullable<Integer> id;
     private OptionalNullable<String> value;
     private OptionalNullable<Integer> resourceId;
@@ -280,7 +282,7 @@ public void unsetMetafieldId() {
     public String toString() {
         return "Metadata [" + "id=" + id + ", value=" + value + ", resourceId=" + resourceId
                 + ", name=" + name + ", deletedAt=" + deletedAt + ", metafieldId=" + metafieldId
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Metafield.java b/src/main/java/com/maxio/advancedbilling/models/Metafield.java
index 0b87a282..89cbc96d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Metafield.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Metafield.java
@@ -11,12 +11,14 @@
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.models.containers.MetafieldEnum;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for Metafield type.
  */
-public class Metafield {
+public class Metafield
+        extends BaseModel {
     private Integer id;
     private String name;
     private MetafieldScope scope;
@@ -225,7 +227,8 @@ public void unsetEnum() {
     @Override
     public String toString() {
         return "Metafield [" + "id=" + id + ", name=" + name + ", scope=" + scope + ", dataCount="
-                + dataCount + ", inputType=" + inputType + ", mEnum=" + mEnum + "]";
+                + dataCount + ", inputType=" + inputType + ", mEnum=" + mEnum
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/MetafieldScope.java b/src/main/java/com/maxio/advancedbilling/models/MetafieldScope.java
index 1280c061..5d559c55 100644
--- a/src/main/java/com/maxio/advancedbilling/models/MetafieldScope.java
+++ b/src/main/java/com/maxio/advancedbilling/models/MetafieldScope.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for MetafieldScope type.
  */
-public class MetafieldScope {
+public class MetafieldScope
+        extends BaseModel {
     private IncludeOption csv;
     private IncludeOption invoices;
     private IncludeOption statements;
@@ -209,7 +211,8 @@ public void setHosted(List<String> hosted) {
     public String toString() {
         return "MetafieldScope [" + "csv=" + csv + ", invoices=" + invoices + ", statements="
                 + statements + ", portal=" + portal + ", publicShow=" + publicShow + ", publicEdit="
-                + publicEdit + ", hosted=" + hosted + "]";
+                + publicEdit + ", hosted=" + hosted + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/MeteredComponent.java b/src/main/java/com/maxio/advancedbilling/models/MeteredComponent.java
index 4bc0e480..17ed438e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/MeteredComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/MeteredComponent.java
@@ -11,13 +11,15 @@
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.models.containers.MeteredComponentUnitPrice;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.util.List;
 
 /**
  * This is a model class for MeteredComponent type.
  */
-public class MeteredComponent {
+public class MeteredComponent
+        extends BaseModel {
     private String name;
     private String unitName;
     private String description;
@@ -640,7 +642,8 @@ public String toString() {
                 + hideDateRangeOnInvoice + ", priceInCents=" + priceInCents
                 + ", displayOnHostedPage=" + displayOnHostedPage + ", allowFractionalQuantities="
                 + allowFractionalQuantities + ", publicSignupPageIds=" + publicSignupPageIds
-                + ", interval=" + interval + ", intervalUnit=" + intervalUnit + "]";
+                + ", interval=" + interval + ", intervalUnit=" + intervalUnit
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/MeteredUsage.java b/src/main/java/com/maxio/advancedbilling/models/MeteredUsage.java
index 45b6f26d..9cadd39b 100644
--- a/src/main/java/com/maxio/advancedbilling/models/MeteredUsage.java
+++ b/src/main/java/com/maxio/advancedbilling/models/MeteredUsage.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for MeteredUsage type.
  */
-public class MeteredUsage {
+public class MeteredUsage
+        extends BaseModel {
     private String previousUnitBalance;
     private int newUnitBalance;
     private int usageQuantity;
@@ -169,7 +171,8 @@ public void setMemo(String memo) {
     public String toString() {
         return "MeteredUsage [" + "previousUnitBalance=" + previousUnitBalance + ", newUnitBalance="
                 + newUnitBalance + ", usageQuantity=" + usageQuantity + ", componentId="
-                + componentId + ", componentHandle=" + componentHandle + ", memo=" + memo + "]";
+                + componentId + ", componentHandle=" + componentHandle + ", memo=" + memo
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Movement.java b/src/main/java/com/maxio/advancedbilling/models/Movement.java
index 5340b5b6..50f43fcd 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Movement.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Movement.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 import java.util.List;
 
 /**
  * This is a model class for Movement type.
  */
-public class Movement {
+public class Movement
+        extends BaseModel {
     private ZonedDateTime timestamp;
     private Long amountInCents;
     private String amountFormatted;
@@ -250,7 +252,8 @@ public String toString() {
         return "Movement [" + "timestamp=" + timestamp + ", amountInCents=" + amountInCents
                 + ", amountFormatted=" + amountFormatted + ", description=" + description
                 + ", category=" + category + ", breakouts=" + breakouts + ", lineItems=" + lineItems
-                + ", subscriptionId=" + subscriptionId + ", subscriberName=" + subscriberName + "]";
+                + ", subscriptionId=" + subscriptionId + ", subscriberName=" + subscriberName
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/MovementLineItem.java b/src/main/java/com/maxio/advancedbilling/models/MovementLineItem.java
index c3fb98c0..ef16aef5 100644
--- a/src/main/java/com/maxio/advancedbilling/models/MovementLineItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/MovementLineItem.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for MovementLineItem type.
  */
-public class MovementLineItem {
+public class MovementLineItem
+        extends BaseModel {
     private Integer productId;
     private Integer componentId;
     private Integer pricePointId;
@@ -250,7 +252,8 @@ public String toString() {
         return "MovementLineItem [" + "productId=" + productId + ", componentId=" + componentId
                 + ", pricePointId=" + pricePointId + ", name=" + name + ", mrr=" + mrr
                 + ", mrrMovements=" + mrrMovements + ", quantity=" + quantity + ", prevQuantity="
-                + prevQuantity + ", recurring=" + recurring + "]";
+                + prevQuantity + ", recurring=" + recurring + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/MultiInvoicePayment.java b/src/main/java/com/maxio/advancedbilling/models/MultiInvoicePayment.java
index a49b1c08..f0628ea7 100644
--- a/src/main/java/com/maxio/advancedbilling/models/MultiInvoicePayment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/MultiInvoicePayment.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for MultiInvoicePayment type.
  */
-public class MultiInvoicePayment {
+public class MultiInvoicePayment
+        extends BaseModel {
     private Integer transactionId;
     private String totalAmount;
     private String currencyCode;
@@ -136,7 +138,7 @@ public void setApplications(List<InvoicePaymentApplication> applications) {
     public String toString() {
         return "MultiInvoicePayment [" + "transactionId=" + transactionId + ", totalAmount="
                 + totalAmount + ", currencyCode=" + currencyCode + ", applications=" + applications
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/MultiInvoicePaymentResponse.java b/src/main/java/com/maxio/advancedbilling/models/MultiInvoicePaymentResponse.java
index 10cb25af..bc56dc60 100644
--- a/src/main/java/com/maxio/advancedbilling/models/MultiInvoicePaymentResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/MultiInvoicePaymentResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for MultiInvoicePaymentResponse type.
  */
-public class MultiInvoicePaymentResponse {
+public class MultiInvoicePaymentResponse
+        extends BaseModel {
     private MultiInvoicePayment payment;
 
     /**
@@ -54,7 +56,8 @@ public void setPayment(MultiInvoicePayment payment) {
      */
     @Override
     public String toString() {
-        return "MultiInvoicePaymentResponse [" + "payment=" + payment + "]";
+        return "MultiInvoicePaymentResponse [" + "payment=" + payment + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/NestedSubscriptionGroup.java b/src/main/java/com/maxio/advancedbilling/models/NestedSubscriptionGroup.java
index ef044ce3..029ee660 100644
--- a/src/main/java/com/maxio/advancedbilling/models/NestedSubscriptionGroup.java
+++ b/src/main/java/com/maxio/advancedbilling/models/NestedSubscriptionGroup.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for NestedSubscriptionGroup type.
  */
-public class NestedSubscriptionGroup {
+public class NestedSubscriptionGroup
+        extends BaseModel {
     private String uid;
     private Integer scheme;
     private Integer primarySubscriptionId;
@@ -138,7 +140,8 @@ public void setPrimary(Boolean primary) {
     @Override
     public String toString() {
         return "NestedSubscriptionGroup [" + "uid=" + uid + ", scheme=" + scheme
-                + ", primarySubscriptionId=" + primarySubscriptionId + ", primary=" + primary + "]";
+                + ", primarySubscriptionId=" + primarySubscriptionId + ", primary=" + primary
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/NetTerms.java b/src/main/java/com/maxio/advancedbilling/models/NetTerms.java
index cc2e38a3..7fe0cd1b 100644
--- a/src/main/java/com/maxio/advancedbilling/models/NetTerms.java
+++ b/src/main/java/com/maxio/advancedbilling/models/NetTerms.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for NetTerms type.
  */
-public class NetTerms {
+public class NetTerms
+        extends BaseModel {
     private Integer defaultNetTerms;
     private Integer automaticNetTerms;
     private Integer remittanceNetTerms;
@@ -157,7 +159,8 @@ public String toString() {
         return "NetTerms [" + "defaultNetTerms=" + defaultNetTerms + ", automaticNetTerms="
                 + automaticNetTerms + ", remittanceNetTerms=" + remittanceNetTerms
                 + ", netTermsOnRemittanceSignupsEnabled=" + netTermsOnRemittanceSignupsEnabled
-                + ", customNetTermsEnabled=" + customNetTermsEnabled + "]";
+                + ", customNetTermsEnabled=" + customNetTermsEnabled + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Offer.java b/src/main/java/com/maxio/advancedbilling/models/Offer.java
index e3dfc327..a813993c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Offer.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Offer.java
@@ -12,6 +12,7 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 import java.util.List;
@@ -19,7 +20,8 @@
 /**
  * This is a model class for Offer type.
  */
-public class Offer {
+public class Offer
+        extends BaseModel {
     private Integer id;
     private Integer siteId;
     private Integer productFamilyId;
@@ -572,7 +574,8 @@ public String toString() {
                 + archivedAt + ", offerItems=" + offerItems + ", offerDiscounts=" + offerDiscounts
                 + ", productFamilyName=" + productFamilyName + ", productName=" + productName
                 + ", productPricePointName=" + productPricePointName + ", productPriceInCents="
-                + productPriceInCents + ", offerSignupPages=" + offerSignupPages + "]";
+                + productPriceInCents + ", offerSignupPages=" + offerSignupPages
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/OfferDiscount.java b/src/main/java/com/maxio/advancedbilling/models/OfferDiscount.java
index 22851c5d..7a7d84a8 100644
--- a/src/main/java/com/maxio/advancedbilling/models/OfferDiscount.java
+++ b/src/main/java/com/maxio/advancedbilling/models/OfferDiscount.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for OfferDiscount type.
  */
-public class OfferDiscount {
+public class OfferDiscount
+        extends BaseModel {
     private String couponCode;
     private Integer couponId;
     private String couponName;
@@ -103,7 +105,8 @@ public void setCouponName(String couponName) {
     @Override
     public String toString() {
         return "OfferDiscount [" + "couponCode=" + couponCode + ", couponId=" + couponId
-                + ", couponName=" + couponName + "]";
+                + ", couponName=" + couponName + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/OfferItem.java b/src/main/java/com/maxio/advancedbilling/models/OfferItem.java
index 8bbfb947..f73a56d5 100644
--- a/src/main/java/com/maxio/advancedbilling/models/OfferItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/OfferItem.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for OfferItem type.
  */
-public class OfferItem {
+public class OfferItem
+        extends BaseModel {
     private Integer componentId;
     private Integer pricePointId;
     private String startingQuantity;
@@ -278,7 +280,8 @@ public String toString() {
                 + ", startingQuantity=" + startingQuantity + ", editable=" + editable
                 + ", componentUnitPrice=" + componentUnitPrice + ", componentName=" + componentName
                 + ", pricePointName=" + pricePointName + ", currencyPrices=" + currencyPrices
-                + ", interval=" + interval + ", intervalUnit=" + intervalUnit + "]";
+                + ", interval=" + interval + ", intervalUnit=" + intervalUnit
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/OfferResponse.java b/src/main/java/com/maxio/advancedbilling/models/OfferResponse.java
index 9aead254..18e429f2 100644
--- a/src/main/java/com/maxio/advancedbilling/models/OfferResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/OfferResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for OfferResponse type.
  */
-public class OfferResponse {
+public class OfferResponse
+        extends BaseModel {
     private Offer offer;
 
     /**
@@ -56,7 +58,8 @@ public void setOffer(Offer offer) {
      */
     @Override
     public String toString() {
-        return "OfferResponse [" + "offer=" + offer + "]";
+        return "OfferResponse [" + "offer=" + offer + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/OfferSignupPage.java b/src/main/java/com/maxio/advancedbilling/models/OfferSignupPage.java
index 997aa3ce..f2b8e8ff 100644
--- a/src/main/java/com/maxio/advancedbilling/models/OfferSignupPage.java
+++ b/src/main/java/com/maxio/advancedbilling/models/OfferSignupPage.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for OfferSignupPage type.
  */
-public class OfferSignupPage {
+public class OfferSignupPage
+        extends BaseModel {
     private Integer id;
     private String nickname;
     private Boolean enabled;
@@ -173,7 +175,7 @@ public void setUrl(String url) {
     public String toString() {
         return "OfferSignupPage [" + "id=" + id + ", nickname=" + nickname + ", enabled=" + enabled
                 + ", returnUrl=" + returnUrl + ", returnParams=" + returnParams + ", url=" + url
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/OnOffComponent.java b/src/main/java/com/maxio/advancedbilling/models/OnOffComponent.java
index a29735be..e8fd0e6f 100644
--- a/src/main/java/com/maxio/advancedbilling/models/OnOffComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/OnOffComponent.java
@@ -11,13 +11,15 @@
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.models.containers.OnOffComponentUnitPrice;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.util.List;
 
 /**
  * This is a model class for OnOffComponent type.
  */
-public class OnOffComponent {
+public class OnOffComponent
+        extends BaseModel {
     private String name;
     private String description;
     private String handle;
@@ -579,7 +581,8 @@ public String toString() {
                 + priceInCents + ", displayOnHostedPage=" + displayOnHostedPage
                 + ", allowFractionalQuantities=" + allowFractionalQuantities
                 + ", publicSignupPageIds=" + publicSignupPageIds + ", interval=" + interval
-                + ", intervalUnit=" + intervalUnit + "]";
+                + ", intervalUnit=" + intervalUnit + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/OrganizationAddress.java b/src/main/java/com/maxio/advancedbilling/models/OrganizationAddress.java
index a6cf6aeb..de50064e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/OrganizationAddress.java
+++ b/src/main/java/com/maxio/advancedbilling/models/OrganizationAddress.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for OrganizationAddress type.
  */
-public class OrganizationAddress {
+public class OrganizationAddress
+        extends BaseModel {
     private OptionalNullable<String> street;
     private OptionalNullable<String> line2;
     private OptionalNullable<String> city;
@@ -375,7 +377,7 @@ public void unsetPhone() {
     public String toString() {
         return "OrganizationAddress [" + "street=" + street + ", line2=" + line2 + ", city=" + city
                 + ", state=" + state + ", zip=" + zip + ", country=" + country + ", name=" + name
-                + ", phone=" + phone + "]";
+                + ", phone=" + phone + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/OriginInvoice.java b/src/main/java/com/maxio/advancedbilling/models/OriginInvoice.java
index 65e49758..f3f3284d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/OriginInvoice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/OriginInvoice.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for OriginInvoice type.
  */
-public class OriginInvoice {
+public class OriginInvoice
+        extends BaseModel {
     private String uid;
     private String number;
 
@@ -83,7 +85,8 @@ public void setNumber(String number) {
      */
     @Override
     public String toString() {
-        return "OriginInvoice [" + "uid=" + uid + ", number=" + number + "]";
+        return "OriginInvoice [" + "uid=" + uid + ", number=" + number + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/OveragePricing.java b/src/main/java/com/maxio/advancedbilling/models/OveragePricing.java
index eeeae7bd..4ad38a99 100644
--- a/src/main/java/com/maxio/advancedbilling/models/OveragePricing.java
+++ b/src/main/java/com/maxio/advancedbilling/models/OveragePricing.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for OveragePricing type.
  */
-public class OveragePricing {
+public class OveragePricing
+        extends BaseModel {
     private PricingScheme pricingScheme;
     private List<Price> prices;
 
@@ -85,7 +87,8 @@ public void setPrices(List<Price> prices) {
      */
     @Override
     public String toString() {
-        return "OveragePricing [" + "pricingScheme=" + pricingScheme + ", prices=" + prices + "]";
+        return "OveragePricing [" + "pricingScheme=" + pricingScheme + ", prices=" + prices
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/OverrideSubscription.java b/src/main/java/com/maxio/advancedbilling/models/OverrideSubscription.java
index 301fc97c..1b0563d5 100644
--- a/src/main/java/com/maxio/advancedbilling/models/OverrideSubscription.java
+++ b/src/main/java/com/maxio/advancedbilling/models/OverrideSubscription.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for OverrideSubscription type.
  */
-public class OverrideSubscription {
+public class OverrideSubscription
+        extends BaseModel {
     private ZonedDateTime activatedAt;
     private ZonedDateTime canceledAt;
     private String cancellationMessage;
@@ -190,7 +192,8 @@ public void setCurrentPeriodStartsAt(ZonedDateTime currentPeriodStartsAt) {
     public String toString() {
         return "OverrideSubscription [" + "activatedAt=" + activatedAt + ", canceledAt="
                 + canceledAt + ", cancellationMessage=" + cancellationMessage + ", expiresAt="
-                + expiresAt + ", currentPeriodStartsAt=" + currentPeriodStartsAt + "]";
+                + expiresAt + ", currentPeriodStartsAt=" + currentPeriodStartsAt
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/OverrideSubscriptionRequest.java b/src/main/java/com/maxio/advancedbilling/models/OverrideSubscriptionRequest.java
index fd25b464..6d0a6b63 100644
--- a/src/main/java/com/maxio/advancedbilling/models/OverrideSubscriptionRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/OverrideSubscriptionRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for OverrideSubscriptionRequest type.
  */
-public class OverrideSubscriptionRequest {
+public class OverrideSubscriptionRequest
+        extends BaseModel {
     private OverrideSubscription subscription;
 
     /**
@@ -54,7 +56,8 @@ public void setSubscription(OverrideSubscription subscription) {
      */
     @Override
     public String toString() {
-        return "OverrideSubscriptionRequest [" + "subscription=" + subscription + "]";
+        return "OverrideSubscriptionRequest [" + "subscription=" + subscription
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PaginatedMetadata.java b/src/main/java/com/maxio/advancedbilling/models/PaginatedMetadata.java
index b53b4a8c..ed927d2c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PaginatedMetadata.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PaginatedMetadata.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for PaginatedMetadata type.
  */
-public class PaginatedMetadata {
+public class PaginatedMetadata
+        extends BaseModel {
     private Integer totalCount;
     private Integer currentPage;
     private Integer totalPages;
@@ -151,7 +153,7 @@ public void setMetadata(List<Metadata> metadata) {
     public String toString() {
         return "PaginatedMetadata [" + "totalCount=" + totalCount + ", currentPage=" + currentPage
                 + ", totalPages=" + totalPages + ", perPage=" + perPage + ", metadata=" + metadata
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PaidInvoice.java b/src/main/java/com/maxio/advancedbilling/models/PaidInvoice.java
index 4f6e843c..573fa719 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PaidInvoice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PaidInvoice.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for PaidInvoice type.
  */
-public class PaidInvoice {
+public class PaidInvoice
+        extends BaseModel {
     private String invoiceId;
     private InvoiceStatus status;
     private String dueAmount;
@@ -138,7 +140,8 @@ public void setPaidAmount(String paidAmount) {
     @Override
     public String toString() {
         return "PaidInvoice [" + "invoiceId=" + invoiceId + ", status=" + status + ", dueAmount="
-                + dueAmount + ", paidAmount=" + paidAmount + "]";
+                + dueAmount + ", paidAmount=" + paidAmount + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PauseRequest.java b/src/main/java/com/maxio/advancedbilling/models/PauseRequest.java
index 34d5e54f..fdd3e463 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PauseRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PauseRequest.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for PauseRequest type.
  */
-public class PauseRequest {
+public class PauseRequest
+        extends BaseModel {
     private AutoResume hold;
 
     /**
@@ -56,7 +58,8 @@ public void setHold(AutoResume hold) {
      */
     @Override
     public String toString() {
-        return "PauseRequest [" + "hold=" + hold + "]";
+        return "PauseRequest [" + "hold=" + hold + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PayerAttributes.java b/src/main/java/com/maxio/advancedbilling/models/PayerAttributes.java
index 9256e09a..54f5ccab 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PayerAttributes.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PayerAttributes.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.Map;
 
 /**
  * This is a model class for PayerAttributes type.
  */
-public class PayerAttributes {
+public class PayerAttributes
+        extends BaseModel {
     private String firstName;
     private String lastName;
     private String email;
@@ -458,7 +460,8 @@ public String toString() {
                 + ", city=" + city + ", state=" + state + ", zip=" + zip + ", country=" + country
                 + ", phone=" + phone + ", locale=" + locale + ", vatNumber=" + vatNumber
                 + ", taxExempt=" + taxExempt + ", taxExemptReason=" + taxExemptReason
-                + ", metafields=" + metafields + "]";
+                + ", metafields=" + metafields + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PayerError.java b/src/main/java/com/maxio/advancedbilling/models/PayerError.java
index 1c4eb423..5154c6ff 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PayerError.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PayerError.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for PayerError type.
  */
-public class PayerError {
+public class PayerError
+        extends BaseModel {
     private List<String> lastName;
     private List<String> firstName;
     private List<String> email;
@@ -104,7 +106,7 @@ public void setEmail(List<String> email) {
     @Override
     public String toString() {
         return "PayerError [" + "lastName=" + lastName + ", firstName=" + firstName + ", email="
-                + email + "]";
+                + email + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PaymentCollectionMethodChanged.java b/src/main/java/com/maxio/advancedbilling/models/PaymentCollectionMethodChanged.java
index a6558a25..a12a8716 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PaymentCollectionMethodChanged.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PaymentCollectionMethodChanged.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for PaymentCollectionMethodChanged type.
  */
-public class PaymentCollectionMethodChanged {
+public class PaymentCollectionMethodChanged
+        extends BaseModel {
     private String previousValue;
     private String currentValue;
 
@@ -80,7 +82,8 @@ public void setCurrentValue(String currentValue) {
     @Override
     public String toString() {
         return "PaymentCollectionMethodChanged [" + "previousValue=" + previousValue
-                + ", currentValue=" + currentValue + "]";
+                + ", currentValue=" + currentValue + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PaymentForAllocation.java b/src/main/java/com/maxio/advancedbilling/models/PaymentForAllocation.java
index f4b1d795..3a590600 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PaymentForAllocation.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PaymentForAllocation.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for PaymentForAllocation type.
  */
-public class PaymentForAllocation {
+public class PaymentForAllocation
+        extends BaseModel {
     private Integer id;
     private Long amountInCents;
     private Boolean success;
@@ -126,7 +128,8 @@ public void setMemo(String memo) {
     @Override
     public String toString() {
         return "PaymentForAllocation [" + "id=" + id + ", amountInCents=" + amountInCents
-                + ", success=" + success + ", memo=" + memo + "]";
+                + ", success=" + success + ", memo=" + memo + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PaymentMethodApplePay.java b/src/main/java/com/maxio/advancedbilling/models/PaymentMethodApplePay.java
index 2c86918f..2171f0c5 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PaymentMethodApplePay.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PaymentMethodApplePay.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for PaymentMethodApplePay type.
  */
-public class PaymentMethodApplePay {
+public class PaymentMethodApplePay
+        extends BaseModel {
     private InvoiceEventPaymentMethod type;
 
     /**
@@ -57,7 +59,8 @@ public void setType(InvoiceEventPaymentMethod type) {
      */
     @Override
     public String toString() {
-        return "PaymentMethodApplePay [" + "type=" + type + "]";
+        return "PaymentMethodApplePay [" + "type=" + type + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PaymentMethodBankAccount.java b/src/main/java/com/maxio/advancedbilling/models/PaymentMethodBankAccount.java
index 6874a823..254c42d4 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PaymentMethodBankAccount.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PaymentMethodBankAccount.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for PaymentMethodBankAccount type.
  */
-public class PaymentMethodBankAccount {
+public class PaymentMethodBankAccount
+        extends BaseModel {
     private String maskedAccountNumber;
     private String maskedRoutingNumber;
     private InvoiceEventPaymentMethod type;
@@ -102,7 +104,8 @@ public void setType(InvoiceEventPaymentMethod type) {
     @Override
     public String toString() {
         return "PaymentMethodBankAccount [" + "maskedAccountNumber=" + maskedAccountNumber
-                + ", maskedRoutingNumber=" + maskedRoutingNumber + ", type=" + type + "]";
+                + ", maskedRoutingNumber=" + maskedRoutingNumber + ", type=" + type
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PaymentMethodCreditCard.java b/src/main/java/com/maxio/advancedbilling/models/PaymentMethodCreditCard.java
index cc5b9747..92bfa2d5 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PaymentMethodCreditCard.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PaymentMethodCreditCard.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for PaymentMethodCreditCard type.
  */
-public class PaymentMethodCreditCard {
+public class PaymentMethodCreditCard
+        extends BaseModel {
     private String cardBrand;
     private String cardExpiration;
     private OptionalNullable<String> lastFour;
@@ -201,7 +203,8 @@ public void setType(InvoiceEventPaymentMethod type) {
     public String toString() {
         return "PaymentMethodCreditCard [" + "cardBrand=" + cardBrand + ", maskedCardNumber="
                 + maskedCardNumber + ", type=" + type + ", cardExpiration=" + cardExpiration
-                + ", lastFour=" + lastFour + "]";
+                + ", lastFour=" + lastFour + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PaymentMethodExternal.java b/src/main/java/com/maxio/advancedbilling/models/PaymentMethodExternal.java
index dd822969..a04ef497 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PaymentMethodExternal.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PaymentMethodExternal.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for PaymentMethodExternal type.
  */
-public class PaymentMethodExternal {
+public class PaymentMethodExternal
+        extends BaseModel {
     private String details;
     private String kind;
     private String memo;
@@ -124,7 +126,8 @@ public void setType(InvoiceEventPaymentMethod type) {
     @Override
     public String toString() {
         return "PaymentMethodExternal [" + "details=" + details + ", kind=" + kind + ", memo="
-                + memo + ", type=" + type + "]";
+                + memo + ", type=" + type + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PaymentMethodPaypal.java b/src/main/java/com/maxio/advancedbilling/models/PaymentMethodPaypal.java
index cd5a65f4..e537b64e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PaymentMethodPaypal.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PaymentMethodPaypal.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for PaymentMethodPaypal type.
  */
-public class PaymentMethodPaypal {
+public class PaymentMethodPaypal
+        extends BaseModel {
     private String email;
     private InvoiceEventPaymentMethod type;
 
@@ -79,7 +81,8 @@ public void setType(InvoiceEventPaymentMethod type) {
      */
     @Override
     public String toString() {
-        return "PaymentMethodPaypal [" + "email=" + email + ", type=" + type + "]";
+        return "PaymentMethodPaypal [" + "email=" + email + ", type=" + type
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PaymentProfileAttributes.java b/src/main/java/com/maxio/advancedbilling/models/PaymentProfileAttributes.java
index 83ec00af..5d1f1c08 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PaymentProfileAttributes.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PaymentProfileAttributes.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.models.containers.PaymentProfileAttributesExpirationMonth;
 import com.maxio.advancedbilling.models.containers.PaymentProfileAttributesExpirationYear;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for PaymentProfileAttributes type.
  */
-public class PaymentProfileAttributes {
+public class PaymentProfileAttributes
+        extends BaseModel {
     private String chargifyToken;
     private Integer id;
     private String paymentType;
@@ -819,7 +821,8 @@ public String toString() {
                 + vaultToken + ", customerVaultToken=" + customerVaultToken + ", customerId="
                 + customerId + ", paypalEmail=" + paypalEmail + ", paymentMethodNonce="
                 + paymentMethodNonce + ", gatewayHandle=" + gatewayHandle + ", cvv=" + cvv
-                + ", lastFour=" + lastFour + "]";
+                + ", lastFour=" + lastFour + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PaymentProfileResponse.java b/src/main/java/com/maxio/advancedbilling/models/PaymentProfileResponse.java
index 76464802..a538797f 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PaymentProfileResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PaymentProfileResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.PaymentProfileResponsePaymentProfile;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for PaymentProfileResponse type.
  */
-public class PaymentProfileResponse {
+public class PaymentProfileResponse
+        extends BaseModel {
     private PaymentProfileResponsePaymentProfile paymentProfile;
 
     /**
@@ -55,7 +57,8 @@ public void setPaymentProfile(PaymentProfileResponsePaymentProfile paymentProfil
      */
     @Override
     public String toString() {
-        return "PaymentProfileResponse [" + "paymentProfile=" + paymentProfile + "]";
+        return "PaymentProfileResponse [" + "paymentProfile=" + paymentProfile
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PaymentRelatedEvents.java b/src/main/java/com/maxio/advancedbilling/models/PaymentRelatedEvents.java
index bf7b2207..c7d32a07 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PaymentRelatedEvents.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PaymentRelatedEvents.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for PaymentRelatedEvents type.
  */
-public class PaymentRelatedEvents {
+public class PaymentRelatedEvents
+        extends BaseModel {
     private int productId;
     private int accountTransactionId;
 
@@ -80,7 +82,8 @@ public void setAccountTransactionId(int accountTransactionId) {
     @Override
     public String toString() {
         return "PaymentRelatedEvents [" + "productId=" + productId + ", accountTransactionId="
-                + accountTransactionId + "]";
+                + accountTransactionId + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PendingCancellationChange.java b/src/main/java/com/maxio/advancedbilling/models/PendingCancellationChange.java
index 03e41790..62a7ed0e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PendingCancellationChange.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PendingCancellationChange.java
@@ -13,12 +13,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for PendingCancellationChange type.
  */
-public class PendingCancellationChange {
+public class PendingCancellationChange
+        extends BaseModel {
     private String cancellationState;
     private ZonedDateTime cancelsAt;
 
@@ -86,7 +88,8 @@ public void setCancelsAt(ZonedDateTime cancelsAt) {
     @Override
     public String toString() {
         return "PendingCancellationChange [" + "cancellationState=" + cancellationState
-                + ", cancelsAt=" + cancelsAt + "]";
+                + ", cancelsAt=" + cancelsAt + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PortalManagementLink.java b/src/main/java/com/maxio/advancedbilling/models/PortalManagementLink.java
index 23fa950f..e3422017 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PortalManagementLink.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PortalManagementLink.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for PortalManagementLink type.
  */
-public class PortalManagementLink {
+public class PortalManagementLink
+        extends BaseModel {
     private String url;
     private Integer fetchCount;
     private ZonedDateTime createdAt;
@@ -222,7 +224,8 @@ public void unsetLastInviteSentAt() {
     public String toString() {
         return "PortalManagementLink [" + "url=" + url + ", fetchCount=" + fetchCount
                 + ", createdAt=" + createdAt + ", newLinkAvailableAt=" + newLinkAvailableAt
-                + ", expiresAt=" + expiresAt + ", lastInviteSentAt=" + lastInviteSentAt + "]";
+                + ", expiresAt=" + expiresAt + ", lastInviteSentAt=" + lastInviteSentAt
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PrepaidComponentPricePoint.java b/src/main/java/com/maxio/advancedbilling/models/PrepaidComponentPricePoint.java
index d4735ffe..a7c8100e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PrepaidComponentPricePoint.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PrepaidComponentPricePoint.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for PrepaidComponentPricePoint type.
  */
-public class PrepaidComponentPricePoint {
+public class PrepaidComponentPricePoint
+        extends BaseModel {
     private String name;
     private String handle;
     private PricingScheme pricingScheme;
@@ -157,7 +159,7 @@ public void setOveragePricing(OveragePricing overagePricing) {
     public String toString() {
         return "PrepaidComponentPricePoint [" + "name=" + name + ", handle=" + handle
                 + ", pricingScheme=" + pricingScheme + ", prices=" + prices + ", overagePricing="
-                + overagePricing + "]";
+                + overagePricing + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PrepaidConfiguration.java b/src/main/java/com/maxio/advancedbilling/models/PrepaidConfiguration.java
index ea059788..e25199fa 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PrepaidConfiguration.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PrepaidConfiguration.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for PrepaidConfiguration type.
  */
-public class PrepaidConfiguration {
+public class PrepaidConfiguration
+        extends BaseModel {
     private Integer id;
     private Long initialFundingAmountInCents;
     private Long replenishToAmountInCents;
@@ -151,7 +153,8 @@ public String toString() {
         return "PrepaidConfiguration [" + "id=" + id + ", initialFundingAmountInCents="
                 + initialFundingAmountInCents + ", replenishToAmountInCents="
                 + replenishToAmountInCents + ", autoReplenish=" + autoReplenish
-                + ", replenishThresholdAmountInCents=" + replenishThresholdAmountInCents + "]";
+                + ", replenishThresholdAmountInCents=" + replenishThresholdAmountInCents
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PrepaidConfigurationResponse.java b/src/main/java/com/maxio/advancedbilling/models/PrepaidConfigurationResponse.java
index 08daaf3a..5b36d9b8 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PrepaidConfigurationResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PrepaidConfigurationResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for PrepaidConfigurationResponse type.
  */
-public class PrepaidConfigurationResponse {
+public class PrepaidConfigurationResponse
+        extends BaseModel {
     private PrepaidConfiguration prepaidConfiguration;
 
     /**
@@ -55,7 +57,7 @@ public void setPrepaidConfiguration(PrepaidConfiguration prepaidConfiguration) {
     @Override
     public String toString() {
         return "PrepaidConfigurationResponse [" + "prepaidConfiguration=" + prepaidConfiguration
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PrepaidSubscriptionBalanceChanged.java b/src/main/java/com/maxio/advancedbilling/models/PrepaidSubscriptionBalanceChanged.java
index a045aed3..15c5f1fe 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PrepaidSubscriptionBalanceChanged.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PrepaidSubscriptionBalanceChanged.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for PrepaidSubscriptionBalanceChanged type.
  */
-public class PrepaidSubscriptionBalanceChanged {
+public class PrepaidSubscriptionBalanceChanged
+        extends BaseModel {
     private String reason;
     private long currentAccountBalanceInCents;
     private long prepaymentAccountBalanceInCents;
@@ -126,7 +128,8 @@ public String toString() {
         return "PrepaidSubscriptionBalanceChanged [" + "reason=" + reason
                 + ", currentAccountBalanceInCents=" + currentAccountBalanceInCents
                 + ", prepaymentAccountBalanceInCents=" + prepaymentAccountBalanceInCents
-                + ", currentUsageAmountInCents=" + currentUsageAmountInCents + "]";
+                + ", currentUsageAmountInCents=" + currentUsageAmountInCents
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PrepaidUsage.java b/src/main/java/com/maxio/advancedbilling/models/PrepaidUsage.java
index c5af10fd..a68bf69f 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PrepaidUsage.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PrepaidUsage.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for PrepaidUsage type.
  */
-public class PrepaidUsage {
+public class PrepaidUsage
+        extends BaseModel {
     private String previousUnitBalance;
     private String previousOverageUnitBalance;
     private int newUnitBalance;
@@ -262,7 +264,7 @@ public String toString() {
                 + ", usageQuantity=" + usageQuantity + ", overageUsageQuantity="
                 + overageUsageQuantity + ", componentId=" + componentId + ", componentHandle="
                 + componentHandle + ", memo=" + memo + ", allocationDetails=" + allocationDetails
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PrepaidUsageAllocationDetail.java b/src/main/java/com/maxio/advancedbilling/models/PrepaidUsageAllocationDetail.java
index 3881671b..c8dea1a1 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PrepaidUsageAllocationDetail.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PrepaidUsageAllocationDetail.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for PrepaidUsageAllocationDetail type.
  */
-public class PrepaidUsageAllocationDetail {
+public class PrepaidUsageAllocationDetail
+        extends BaseModel {
     private Integer allocationId;
     private Integer chargeId;
     private Integer usageQuantity;
@@ -103,7 +105,8 @@ public void setUsageQuantity(Integer usageQuantity) {
     @Override
     public String toString() {
         return "PrepaidUsageAllocationDetail [" + "allocationId=" + allocationId + ", chargeId="
-                + chargeId + ", usageQuantity=" + usageQuantity + "]";
+                + chargeId + ", usageQuantity=" + usageQuantity + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PrepaidUsageComponent.java b/src/main/java/com/maxio/advancedbilling/models/PrepaidUsageComponent.java
index 3a9b6507..bf5ce6f6 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PrepaidUsageComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PrepaidUsageComponent.java
@@ -11,13 +11,15 @@
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.models.containers.PrepaidUsageComponentUnitPrice;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.util.List;
 
 /**
  * This is a model class for PrepaidUsageComponent type.
  */
-public class PrepaidUsageComponent {
+public class PrepaidUsageComponent
+        extends BaseModel {
     private String name;
     private String unitName;
     private String description;
@@ -725,7 +727,8 @@ public String toString() {
                 + ", renewPrepaidAllocation=" + renewPrepaidAllocation + ", expirationInterval="
                 + expirationInterval + ", expirationIntervalUnit=" + expirationIntervalUnit
                 + ", displayOnHostedPage=" + displayOnHostedPage + ", allowFractionalQuantities="
-                + allowFractionalQuantities + ", publicSignupPageIds=" + publicSignupPageIds + "]";
+                + allowFractionalQuantities + ", publicSignupPageIds=" + publicSignupPageIds
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Prepayment.java b/src/main/java/com/maxio/advancedbilling/models/Prepayment.java
index 7da79454..cf1c3158 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Prepayment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Prepayment.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for Prepayment type.
  */
-public class Prepayment {
+public class Prepayment
+        extends BaseModel {
     private int id;
     private int subscriptionId;
     private long amountInCents;
@@ -268,7 +270,8 @@ public String toString() {
                 + ", amountInCents=" + amountInCents + ", remainingAmountInCents="
                 + remainingAmountInCents + ", external=" + external + ", memo=" + memo
                 + ", createdAt=" + createdAt + ", refundedAmountInCents=" + refundedAmountInCents
-                + ", details=" + details + ", paymentType=" + paymentType + "]";
+                + ", details=" + details + ", paymentType=" + paymentType
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PrepaymentAccountBalanceChanged.java b/src/main/java/com/maxio/advancedbilling/models/PrepaymentAccountBalanceChanged.java
index f6e9b8e3..a08c602f 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PrepaymentAccountBalanceChanged.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PrepaymentAccountBalanceChanged.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for PrepaymentAccountBalanceChanged type.
  */
-public class PrepaymentAccountBalanceChanged {
+public class PrepaymentAccountBalanceChanged
+        extends BaseModel {
     private String reason;
     private long prepaymentAccountBalanceInCents;
     private long prepaymentBalanceChangeInCents;
@@ -126,7 +128,8 @@ public String toString() {
         return "PrepaymentAccountBalanceChanged [" + "reason=" + reason
                 + ", prepaymentAccountBalanceInCents=" + prepaymentAccountBalanceInCents
                 + ", prepaymentBalanceChangeInCents=" + prepaymentBalanceChangeInCents
-                + ", currencyCode=" + currencyCode + "]";
+                + ", currencyCode=" + currencyCode + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PrepaymentAggregatedError.java b/src/main/java/com/maxio/advancedbilling/models/PrepaymentAggregatedError.java
index b220f699..956e480a 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PrepaymentAggregatedError.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PrepaymentAggregatedError.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for PrepaymentAggregatedError type.
  */
-public class PrepaymentAggregatedError {
+public class PrepaymentAggregatedError
+        extends BaseModel {
     private List<String> amountInCents;
     private List<String> base;
     private List<String> external;
@@ -104,7 +106,8 @@ public void setExternal(List<String> external) {
     @Override
     public String toString() {
         return "PrepaymentAggregatedError [" + "amountInCents=" + amountInCents + ", base=" + base
-                + ", external=" + external + "]";
+                + ", external=" + external + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PrepaymentResponse.java b/src/main/java/com/maxio/advancedbilling/models/PrepaymentResponse.java
index b4ff933a..60919573 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PrepaymentResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PrepaymentResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for PrepaymentResponse type.
  */
-public class PrepaymentResponse {
+public class PrepaymentResponse
+        extends BaseModel {
     private Prepayment prepayment;
 
     /**
@@ -54,7 +56,8 @@ public void setPrepayment(Prepayment prepayment) {
      */
     @Override
     public String toString() {
-        return "PrepaymentResponse [" + "prepayment=" + prepayment + "]";
+        return "PrepaymentResponse [" + "prepayment=" + prepayment + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PrepaymentsResponse.java b/src/main/java/com/maxio/advancedbilling/models/PrepaymentsResponse.java
index 05d46e97..8285e9ed 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PrepaymentsResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PrepaymentsResponse.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for PrepaymentsResponse type.
  */
-public class PrepaymentsResponse {
+public class PrepaymentsResponse
+        extends BaseModel {
     private List<Prepayment> prepayments;
 
     /**
@@ -57,7 +59,8 @@ public void setPrepayments(List<Prepayment> prepayments) {
      */
     @Override
     public String toString() {
-        return "PrepaymentsResponse [" + "prepayments=" + prepayments + "]";
+        return "PrepaymentsResponse [" + "prepayments=" + prepayments + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PreviewAllocationsRequest.java b/src/main/java/com/maxio/advancedbilling/models/PreviewAllocationsRequest.java
index 974c9079..428bfa12 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PreviewAllocationsRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PreviewAllocationsRequest.java
@@ -12,6 +12,7 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.LocalDate;
 import java.util.List;
@@ -19,7 +20,8 @@
 /**
  * This is a model class for PreviewAllocationsRequest type.
  */
-public class PreviewAllocationsRequest {
+public class PreviewAllocationsRequest
+        extends BaseModel {
     private List<CreateAllocation> allocations;
     private LocalDate effectiveProrationDate;
     private OptionalNullable<CreditType> upgradeCharge;
@@ -203,7 +205,8 @@ public void unsetDowngradeCredit() {
     public String toString() {
         return "PreviewAllocationsRequest [" + "allocations=" + allocations
                 + ", effectiveProrationDate=" + effectiveProrationDate + ", upgradeCharge="
-                + upgradeCharge + ", downgradeCredit=" + downgradeCredit + "]";
+                + upgradeCharge + ", downgradeCredit=" + downgradeCredit + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Price.java b/src/main/java/com/maxio/advancedbilling/models/Price.java
index beb7fa50..27561fbe 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Price.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Price.java
@@ -13,12 +13,14 @@
 import com.maxio.advancedbilling.models.containers.PriceEndingQuantity;
 import com.maxio.advancedbilling.models.containers.PriceStartingQuantity;
 import com.maxio.advancedbilling.models.containers.PriceUnitPrice;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for Price type.
  */
-public class Price {
+public class Price
+        extends BaseModel {
     private PriceStartingQuantity startingQuantity;
     private OptionalNullable<PriceEndingQuantity> endingQuantity;
     private PriceUnitPrice unitPrice;
@@ -138,7 +140,8 @@ public void setUnitPrice(PriceUnitPrice unitPrice) {
     @Override
     public String toString() {
         return "Price [" + "startingQuantity=" + startingQuantity + ", unitPrice=" + unitPrice
-                + ", endingQuantity=" + endingQuantity + "]";
+                + ", endingQuantity=" + endingQuantity + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PricePoint.java b/src/main/java/com/maxio/advancedbilling/models/PricePoint.java
index 4704ba22..20c118e9 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PricePoint.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PricePoint.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for PricePoint type.
  */
-public class PricePoint {
+public class PricePoint
+        extends BaseModel {
     private String name;
     private String handle;
     private PricingScheme pricingScheme;
@@ -374,7 +376,8 @@ public String toString() {
                 + ", intervalUnit=" + intervalUnit + ", overagePricing=" + overagePricing
                 + ", rolloverPrepaidRemainder=" + rolloverPrepaidRemainder
                 + ", renewPrepaidAllocation=" + renewPrepaidAllocation + ", expirationInterval="
-                + expirationInterval + ", expirationIntervalUnit=" + expirationIntervalUnit + "]";
+                + expirationInterval + ", expirationIntervalUnit=" + expirationIntervalUnit
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Product.java b/src/main/java/com/maxio/advancedbilling/models/Product.java
index d0375f2d..a1734dad 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Product.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Product.java
@@ -14,6 +14,7 @@
 import com.maxio.advancedbilling.DateTimeHelper;
 import com.maxio.advancedbilling.models.containers.ProductExpirationIntervalUnit;
 import com.maxio.advancedbilling.models.containers.ProductTrialIntervalUnit;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 import java.util.List;
@@ -21,7 +22,8 @@
 /**
  * This is a model class for Product type.
  */
-public class Product {
+public class Product
+        extends BaseModel {
     private Integer id;
     private String name;
     private OptionalNullable<String> handle;
@@ -1412,7 +1414,8 @@ public String toString() {
                 + ", defaultProductPricePointId=" + defaultProductPricePointId
                 + ", useSiteExchangeRate=" + useSiteExchangeRate + ", itemCategory=" + itemCategory
                 + ", productPricePointId=" + productPricePointId + ", productPricePointHandle="
-                + productPricePointHandle + "]";
+                + productPricePointHandle + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ProductFamily.java b/src/main/java/com/maxio/advancedbilling/models/ProductFamily.java
index dc4269c8..a5bf38c3 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ProductFamily.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ProductFamily.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for ProductFamily type.
  */
-public class ProductFamily {
+public class ProductFamily
+        extends BaseModel {
     private Integer id;
     private String name;
     private String handle;
@@ -260,7 +262,8 @@ public void setUpdatedAt(ZonedDateTime updatedAt) {
     public String toString() {
         return "ProductFamily [" + "id=" + id + ", name=" + name + ", handle=" + handle
                 + ", accountingCode=" + accountingCode + ", description=" + description
-                + ", createdAt=" + createdAt + ", updatedAt=" + updatedAt + "]";
+                + ", createdAt=" + createdAt + ", updatedAt=" + updatedAt
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ProductFamilyResponse.java b/src/main/java/com/maxio/advancedbilling/models/ProductFamilyResponse.java
index e0fe1c87..1ef3190c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ProductFamilyResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ProductFamilyResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ProductFamilyResponse type.
  */
-public class ProductFamilyResponse {
+public class ProductFamilyResponse
+        extends BaseModel {
     private ProductFamily productFamily;
 
     /**
@@ -56,7 +58,8 @@ public void setProductFamily(ProductFamily productFamily) {
      */
     @Override
     public String toString() {
-        return "ProductFamilyResponse [" + "productFamily=" + productFamily + "]";
+        return "ProductFamilyResponse [" + "productFamily=" + productFamily
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ProductPricePoint.java b/src/main/java/com/maxio/advancedbilling/models/ProductPricePoint.java
index 9ccd5b76..e6d45028 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ProductPricePoint.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ProductPricePoint.java
@@ -12,6 +12,7 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 import java.util.List;
@@ -19,7 +20,8 @@
 /**
  * This is a model class for ProductPricePoint type.
  */
-public class ProductPricePoint {
+public class ProductPricePoint
+        extends BaseModel {
     private Integer id;
     private String name;
     private String handle;
@@ -767,7 +769,8 @@ public String toString() {
                 + expirationIntervalUnit + ", productId=" + productId + ", archivedAt=" + archivedAt
                 + ", createdAt=" + createdAt + ", updatedAt=" + updatedAt + ", useSiteExchangeRate="
                 + useSiteExchangeRate + ", type=" + type + ", taxIncluded=" + taxIncluded
-                + ", subscriptionId=" + subscriptionId + ", currencyPrices=" + currencyPrices + "]";
+                + ", subscriptionId=" + subscriptionId + ", currencyPrices=" + currencyPrices
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ProductPricePointErrors.java b/src/main/java/com/maxio/advancedbilling/models/ProductPricePointErrors.java
index d2376f63..ed849c31 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ProductPricePointErrors.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ProductPricePointErrors.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ProductPricePointErrors type.
  */
-public class ProductPricePointErrors {
+public class ProductPricePointErrors
+        extends BaseModel {
     private String pricePoint;
     private List<String> interval;
     private List<String> intervalUnit;
@@ -174,7 +176,8 @@ public void setPriceInCents(List<String> priceInCents) {
     public String toString() {
         return "ProductPricePointErrors [" + "pricePoint=" + pricePoint + ", interval=" + interval
                 + ", intervalUnit=" + intervalUnit + ", name=" + name + ", price=" + price
-                + ", priceInCents=" + priceInCents + "]";
+                + ", priceInCents=" + priceInCents + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ProductPricePointResponse.java b/src/main/java/com/maxio/advancedbilling/models/ProductPricePointResponse.java
index 7c9901f8..7546b459 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ProductPricePointResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ProductPricePointResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ProductPricePointResponse type.
  */
-public class ProductPricePointResponse {
+public class ProductPricePointResponse
+        extends BaseModel {
     private ProductPricePoint pricePoint;
 
     /**
@@ -54,7 +56,8 @@ public void setPricePoint(ProductPricePoint pricePoint) {
      */
     @Override
     public String toString() {
-        return "ProductPricePointResponse [" + "pricePoint=" + pricePoint + "]";
+        return "ProductPricePointResponse [" + "pricePoint=" + pricePoint
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ProductResponse.java b/src/main/java/com/maxio/advancedbilling/models/ProductResponse.java
index fb2bd5da..08d98f7a 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ProductResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ProductResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ProductResponse type.
  */
-public class ProductResponse {
+public class ProductResponse
+        extends BaseModel {
     private Product product;
 
     /**
@@ -54,7 +56,8 @@ public void setProduct(Product product) {
      */
     @Override
     public String toString() {
-        return "ProductResponse [" + "product=" + product + "]";
+        return "ProductResponse [" + "product=" + product + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ProformaError.java b/src/main/java/com/maxio/advancedbilling/models/ProformaError.java
index 5a20bd3a..7b9ee327 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ProformaError.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ProformaError.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ProformaError type.
  */
-public class ProformaError {
+public class ProformaError
+        extends BaseModel {
     private BaseStringError subscription;
 
     /**
@@ -58,7 +60,8 @@ public void setSubscription(BaseStringError subscription) {
      */
     @Override
     public String toString() {
-        return "ProformaError [" + "subscription=" + subscription + "]";
+        return "ProformaError [" + "subscription=" + subscription + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ProformaInvoice.java b/src/main/java/com/maxio/advancedbilling/models/ProformaInvoice.java
index 86c7dc6e..af4fa7fe 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ProformaInvoice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ProformaInvoice.java
@@ -12,6 +12,7 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.LocalDate;
 import java.time.ZonedDateTime;
@@ -20,7 +21,8 @@
 /**
  * This is a model class for ProformaInvoice type.
  */
-public class ProformaInvoice {
+public class ProformaInvoice
+        extends BaseModel {
     private String uid;
     private Integer siteId;
     private OptionalNullable<Integer> customerId;
@@ -1085,7 +1087,8 @@ public String toString() {
                 + creditAmount + ", paidAmount=" + paidAmount + ", refundAmount=" + refundAmount
                 + ", dueAmount=" + dueAmount + ", lineItems=" + lineItems + ", discounts="
                 + discounts + ", taxes=" + taxes + ", credits=" + credits + ", payments=" + payments
-                + ", customFields=" + customFields + ", publicUrl=" + publicUrl + "]";
+                + ", customFields=" + customFields + ", publicUrl=" + publicUrl
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ProformaInvoiceCredit.java b/src/main/java/com/maxio/advancedbilling/models/ProformaInvoiceCredit.java
index 37c2f712..e48720d6 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ProformaInvoiceCredit.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ProformaInvoiceCredit.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ProformaInvoiceCredit type.
  */
-public class ProformaInvoiceCredit {
+public class ProformaInvoiceCredit
+        extends BaseModel {
     private String uid;
     private String memo;
     private String originalAmount;
@@ -126,7 +128,8 @@ public void setAppliedAmount(String appliedAmount) {
     @Override
     public String toString() {
         return "ProformaInvoiceCredit [" + "uid=" + uid + ", memo=" + memo + ", originalAmount="
-                + originalAmount + ", appliedAmount=" + appliedAmount + "]";
+                + originalAmount + ", appliedAmount=" + appliedAmount + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ProformaInvoiceDiscount.java b/src/main/java/com/maxio/advancedbilling/models/ProformaInvoiceDiscount.java
index 4b4690ba..605df1cf 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ProformaInvoiceDiscount.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ProformaInvoiceDiscount.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ProformaInvoiceDiscount type.
  */
-public class ProformaInvoiceDiscount {
+public class ProformaInvoiceDiscount
+        extends BaseModel {
     private String uid;
     private String title;
     private String code;
@@ -221,7 +223,8 @@ public String toString() {
         return "ProformaInvoiceDiscount [" + "uid=" + uid + ", title=" + title + ", code=" + code
                 + ", sourceType=" + sourceType + ", discountType=" + discountType
                 + ", eligibleAmount=" + eligibleAmount + ", discountAmount=" + discountAmount
-                + ", lineItemBreakouts=" + lineItemBreakouts + "]";
+                + ", lineItemBreakouts=" + lineItemBreakouts + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ProformaInvoiceIssued.java b/src/main/java/com/maxio/advancedbilling/models/ProformaInvoiceIssued.java
index 907f1d68..5ebb8f43 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ProformaInvoiceIssued.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ProformaInvoiceIssued.java
@@ -13,6 +13,7 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.LocalDate;
 import java.time.ZonedDateTime;
 import java.util.List;
@@ -20,7 +21,8 @@
 /**
  * This is a model class for ProformaInvoiceIssued type.
  */
-public class ProformaInvoiceIssued {
+public class ProformaInvoiceIssued
+        extends BaseModel {
     private String uid;
     private String number;
     private String role;
@@ -291,7 +293,7 @@ public String toString() {
                 + ", deliveryDate=" + deliveryDate + ", createdAt=" + createdAt + ", dueAmount="
                 + dueAmount + ", paidAmount=" + paidAmount + ", taxAmount=" + taxAmount
                 + ", totalAmount=" + totalAmount + ", productName=" + productName + ", lineItems="
-                + lineItems + "]";
+                + lineItems + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ProformaInvoicePayment.java b/src/main/java/com/maxio/advancedbilling/models/ProformaInvoicePayment.java
index b7b5ee82..036f34f8 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ProformaInvoicePayment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ProformaInvoicePayment.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ProformaInvoicePayment type.
  */
-public class ProformaInvoicePayment {
+public class ProformaInvoicePayment
+        extends BaseModel {
     private String memo;
     private String originalAmount;
     private String appliedAmount;
@@ -126,7 +128,8 @@ public void setPrepayment(Boolean prepayment) {
     @Override
     public String toString() {
         return "ProformaInvoicePayment [" + "memo=" + memo + ", originalAmount=" + originalAmount
-                + ", appliedAmount=" + appliedAmount + ", prepayment=" + prepayment + "]";
+                + ", appliedAmount=" + appliedAmount + ", prepayment=" + prepayment
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ProformaInvoiceTax.java b/src/main/java/com/maxio/advancedbilling/models/ProformaInvoiceTax.java
index e4f6cf04..0f668797 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ProformaInvoiceTax.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ProformaInvoiceTax.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ProformaInvoiceTax type.
  */
-public class ProformaInvoiceTax {
+public class ProformaInvoiceTax
+        extends BaseModel {
     private String uid;
     private String title;
     private ProformaInvoiceTaxSourceType sourceType;
@@ -197,7 +199,8 @@ public void setLineItemBreakouts(List<InvoiceTaxBreakout> lineItemBreakouts) {
     public String toString() {
         return "ProformaInvoiceTax [" + "uid=" + uid + ", title=" + title + ", sourceType="
                 + sourceType + ", percentage=" + percentage + ", taxableAmount=" + taxableAmount
-                + ", taxAmount=" + taxAmount + ", lineItemBreakouts=" + lineItemBreakouts + "]";
+                + ", taxAmount=" + taxAmount + ", lineItemBreakouts=" + lineItemBreakouts
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Proration.java b/src/main/java/com/maxio/advancedbilling/models/Proration.java
index 3dd61ff1..c93a964a 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Proration.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Proration.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for Proration type.
  */
-public class Proration {
+public class Proration
+        extends BaseModel {
     private Boolean preservePeriod;
 
     /**
@@ -58,7 +60,8 @@ public void setPreservePeriod(Boolean preservePeriod) {
      */
     @Override
     public String toString() {
-        return "Proration [" + "preservePeriod=" + preservePeriod + "]";
+        return "Proration [" + "preservePeriod=" + preservePeriod + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PublicKey.java b/src/main/java/com/maxio/advancedbilling/models/PublicKey.java
index b336149f..92601293 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PublicKey.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PublicKey.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for PublicKey type.
  */
-public class PublicKey {
+public class PublicKey
+        extends BaseModel {
     private String publicKey;
     private Boolean requiresSecurityToken;
     private ZonedDateTime createdAt;
@@ -109,7 +111,8 @@ public void setCreatedAt(ZonedDateTime createdAt) {
     @Override
     public String toString() {
         return "PublicKey [" + "publicKey=" + publicKey + ", requiresSecurityToken="
-                + requiresSecurityToken + ", createdAt=" + createdAt + "]";
+                + requiresSecurityToken + ", createdAt=" + createdAt + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/PublicSignupPage.java b/src/main/java/com/maxio/advancedbilling/models/PublicSignupPage.java
index 315ab0c5..295a71ea 100644
--- a/src/main/java/com/maxio/advancedbilling/models/PublicSignupPage.java
+++ b/src/main/java/com/maxio/advancedbilling/models/PublicSignupPage.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for PublicSignupPage type.
  */
-public class PublicSignupPage {
+public class PublicSignupPage
+        extends BaseModel {
     private Integer id;
     private OptionalNullable<String> returnUrl;
     private OptionalNullable<String> returnParams;
@@ -192,7 +194,8 @@ public void setUrl(String url) {
     @Override
     public String toString() {
         return "PublicSignupPage [" + "id=" + id + ", returnUrl=" + returnUrl + ", returnParams="
-                + returnParams + ", url=" + url + "]";
+                + returnParams + ", url=" + url + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/QuantityBasedComponent.java b/src/main/java/com/maxio/advancedbilling/models/QuantityBasedComponent.java
index 9f696b99..79628e18 100644
--- a/src/main/java/com/maxio/advancedbilling/models/QuantityBasedComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/QuantityBasedComponent.java
@@ -11,13 +11,15 @@
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.models.containers.QuantityBasedComponentUnitPrice;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.util.List;
 
 /**
  * This is a model class for QuantityBasedComponent type.
  */
-public class QuantityBasedComponent {
+public class QuantityBasedComponent
+        extends BaseModel {
     private String name;
     private String unitName;
     private String description;
@@ -667,7 +669,8 @@ public String toString() {
                 + priceInCents + ", recurring=" + recurring + ", displayOnHostedPage="
                 + displayOnHostedPage + ", allowFractionalQuantities=" + allowFractionalQuantities
                 + ", publicSignupPageIds=" + publicSignupPageIds + ", interval=" + interval
-                + ", intervalUnit=" + intervalUnit + "]";
+                + ", intervalUnit=" + intervalUnit + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ReactivateSubscriptionGroupRequest.java b/src/main/java/com/maxio/advancedbilling/models/ReactivateSubscriptionGroupRequest.java
index e5d20750..e21dcc3c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ReactivateSubscriptionGroupRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ReactivateSubscriptionGroupRequest.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ReactivateSubscriptionGroupRequest type.
  */
-public class ReactivateSubscriptionGroupRequest {
+public class ReactivateSubscriptionGroupRequest
+        extends BaseModel {
     private Boolean resume;
     private Boolean resumeMembers;
 
@@ -80,7 +82,7 @@ public void setResumeMembers(Boolean resumeMembers) {
     @Override
     public String toString() {
         return "ReactivateSubscriptionGroupRequest [" + "resume=" + resume + ", resumeMembers="
-                + resumeMembers + "]";
+                + resumeMembers + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ReactivateSubscriptionGroupResponse.java b/src/main/java/com/maxio/advancedbilling/models/ReactivateSubscriptionGroupResponse.java
index 475bd63a..c5b739cd 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ReactivateSubscriptionGroupResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ReactivateSubscriptionGroupResponse.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 import java.util.List;
 
 /**
  * This is a model class for ReactivateSubscriptionGroupResponse type.
  */
-public class ReactivateSubscriptionGroupResponse {
+public class ReactivateSubscriptionGroupResponse
+        extends BaseModel {
     private String uid;
     private Integer scheme;
     private Integer customerId;
@@ -251,7 +253,8 @@ public String toString() {
                 + ", customerId=" + customerId + ", paymentProfileId=" + paymentProfileId
                 + ", subscriptionIds=" + subscriptionIds + ", primarySubscriptionId="
                 + primarySubscriptionId + ", nextAssessmentAt=" + nextAssessmentAt + ", state="
-                + state + ", cancelAtEndOfPeriod=" + cancelAtEndOfPeriod + "]";
+                + state + ", cancelAtEndOfPeriod=" + cancelAtEndOfPeriod + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ReactivateSubscriptionRequest.java b/src/main/java/com/maxio/advancedbilling/models/ReactivateSubscriptionRequest.java
index 48e44ca9..e97a0bee 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ReactivateSubscriptionRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ReactivateSubscriptionRequest.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.ReactivateSubscriptionRequestResume;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ReactivateSubscriptionRequest type.
  */
-public class ReactivateSubscriptionRequest {
+public class ReactivateSubscriptionRequest
+        extends BaseModel {
     private ReactivationBilling calendarBilling;
     private Boolean includeTrial;
     private Boolean preserveBalance;
@@ -197,7 +199,8 @@ public String toString() {
         return "ReactivateSubscriptionRequest [" + "calendarBilling=" + calendarBilling
                 + ", includeTrial=" + includeTrial + ", preserveBalance=" + preserveBalance
                 + ", couponCode=" + couponCode + ", useCreditsAndPrepayments="
-                + useCreditsAndPrepayments + ", resume=" + resume + "]";
+                + useCreditsAndPrepayments + ", resume=" + resume + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ReactivationBilling.java b/src/main/java/com/maxio/advancedbilling/models/ReactivationBilling.java
index 964e0ad8..fe428d69 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ReactivationBilling.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ReactivationBilling.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ReactivationBilling type.
  */
-public class ReactivationBilling {
+public class ReactivationBilling
+        extends BaseModel {
     private ReactivationCharge reactivationCharge;
 
     /**
@@ -65,7 +67,8 @@ public void setReactivationCharge(ReactivationCharge reactivationCharge) {
      */
     @Override
     public String toString() {
-        return "ReactivationBilling [" + "reactivationCharge=" + reactivationCharge + "]";
+        return "ReactivationBilling [" + "reactivationCharge=" + reactivationCharge
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ReasonCode.java b/src/main/java/com/maxio/advancedbilling/models/ReasonCode.java
index 3deba690..2830e2df 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ReasonCode.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ReasonCode.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for ReasonCode type.
  */
-public class ReasonCode {
+public class ReasonCode
+        extends BaseModel {
     private Integer id;
     private Integer siteId;
     private String code;
@@ -204,7 +206,8 @@ public void setUpdatedAt(ZonedDateTime updatedAt) {
     public String toString() {
         return "ReasonCode [" + "id=" + id + ", siteId=" + siteId + ", code=" + code
                 + ", description=" + description + ", position=" + position + ", createdAt="
-                + createdAt + ", updatedAt=" + updatedAt + "]";
+                + createdAt + ", updatedAt=" + updatedAt + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ReasonCodeResponse.java b/src/main/java/com/maxio/advancedbilling/models/ReasonCodeResponse.java
index b04b4a09..61c89dcf 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ReasonCodeResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ReasonCodeResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ReasonCodeResponse type.
  */
-public class ReasonCodeResponse {
+public class ReasonCodeResponse
+        extends BaseModel {
     private ReasonCode reasonCode;
 
     /**
@@ -54,7 +56,8 @@ public void setReasonCode(ReasonCode reasonCode) {
      */
     @Override
     public String toString() {
-        return "ReasonCodeResponse [" + "reasonCode=" + reasonCode + "]";
+        return "ReasonCodeResponse [" + "reasonCode=" + reasonCode + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ReasonCodesJsonResponse.java b/src/main/java/com/maxio/advancedbilling/models/ReasonCodesJsonResponse.java
index a3fc2a9a..8fa3e2bb 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ReasonCodesJsonResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ReasonCodesJsonResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ReasonCodesJsonResponse type.
  */
-public class ReasonCodesJsonResponse {
+public class ReasonCodesJsonResponse
+        extends BaseModel {
     private String ok;
 
     /**
@@ -56,7 +58,8 @@ public void setOk(String ok) {
      */
     @Override
     public String toString() {
-        return "ReasonCodesJsonResponse [" + "ok=" + ok + "]";
+        return "ReasonCodesJsonResponse [" + "ok=" + ok + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RecordPaymentRequest.java b/src/main/java/com/maxio/advancedbilling/models/RecordPaymentRequest.java
index f02b40d1..4aa6f7f6 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RecordPaymentRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RecordPaymentRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for RecordPaymentRequest type.
  */
-public class RecordPaymentRequest {
+public class RecordPaymentRequest
+        extends BaseModel {
     private CreatePayment payment;
 
     /**
@@ -54,7 +56,8 @@ public void setPayment(CreatePayment payment) {
      */
     @Override
     public String toString() {
-        return "RecordPaymentRequest [" + "payment=" + payment + "]";
+        return "RecordPaymentRequest [" + "payment=" + payment + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RecordPaymentResponse.java b/src/main/java/com/maxio/advancedbilling/models/RecordPaymentResponse.java
index 5c70683b..c82565d9 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RecordPaymentResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RecordPaymentResponse.java
@@ -11,13 +11,15 @@
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.models.containers.RecordPaymentResponsePrepayment;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.util.List;
 
 /**
  * This is a model class for RecordPaymentResponse type.
  */
-public class RecordPaymentResponse {
+public class RecordPaymentResponse
+        extends BaseModel {
     private List<PaidInvoice> paidInvoices;
     private OptionalNullable<RecordPaymentResponsePrepayment> prepayment;
 
@@ -112,7 +114,7 @@ public void unsetPrepayment() {
     @Override
     public String toString() {
         return "RecordPaymentResponse [" + "paidInvoices=" + paidInvoices + ", prepayment="
-                + prepayment + "]";
+                + prepayment + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ReferralCode.java b/src/main/java/com/maxio/advancedbilling/models/ReferralCode.java
index 77d6d53e..d7f75944 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ReferralCode.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ReferralCode.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ReferralCode type.
  */
-public class ReferralCode {
+public class ReferralCode
+        extends BaseModel {
     private Integer id;
     private Integer siteId;
     private Integer subscriptionId;
@@ -126,7 +128,8 @@ public void setCode(String code) {
     @Override
     public String toString() {
         return "ReferralCode [" + "id=" + id + ", siteId=" + siteId + ", subscriptionId="
-                + subscriptionId + ", code=" + code + "]";
+                + subscriptionId + ", code=" + code + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ReferralValidationResponse.java b/src/main/java/com/maxio/advancedbilling/models/ReferralValidationResponse.java
index 8bb392f1..e203e3dc 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ReferralValidationResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ReferralValidationResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ReferralValidationResponse type.
  */
-public class ReferralValidationResponse {
+public class ReferralValidationResponse
+        extends BaseModel {
     private ReferralCode referralCode;
 
     /**
@@ -56,7 +58,8 @@ public void setReferralCode(ReferralCode referralCode) {
      */
     @Override
     public String toString() {
-        return "ReferralValidationResponse [" + "referralCode=" + referralCode + "]";
+        return "ReferralValidationResponse [" + "referralCode=" + referralCode
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Refund.java b/src/main/java/com/maxio/advancedbilling/models/Refund.java
index 9cf5252b..12b349f5 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Refund.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Refund.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.RefundSegmentUids;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for Refund type.
  */
-public class Refund {
+public class Refund
+        extends BaseModel {
     private String amount;
     private String memo;
     private Integer paymentId;
@@ -219,7 +221,8 @@ public void setSegmentUids(RefundSegmentUids segmentUids) {
     public String toString() {
         return "Refund [" + "amount=" + amount + ", memo=" + memo + ", paymentId=" + paymentId
                 + ", external=" + external + ", applyCredit=" + applyCredit + ", voidInvoice="
-                + voidInvoice + ", segmentUids=" + segmentUids + "]";
+                + voidInvoice + ", segmentUids=" + segmentUids + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RefundConsolidatedInvoice.java b/src/main/java/com/maxio/advancedbilling/models/RefundConsolidatedInvoice.java
index 9d70b7cb..33434b66 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RefundConsolidatedInvoice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RefundConsolidatedInvoice.java
@@ -12,11 +12,13 @@
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.RefundConsolidatedInvoiceSegmentUids;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for RefundConsolidatedInvoice type.
  */
-public class RefundConsolidatedInvoice {
+public class RefundConsolidatedInvoice
+        extends BaseModel {
     private String memo;
     private int paymentId;
     private RefundConsolidatedInvoiceSegmentUids segmentUids;
@@ -205,7 +207,8 @@ public void setAmount(String amount) {
     public String toString() {
         return "RefundConsolidatedInvoice [" + "memo=" + memo + ", paymentId=" + paymentId
                 + ", segmentUids=" + segmentUids + ", external=" + external + ", applyCredit="
-                + applyCredit + ", amount=" + amount + "]";
+                + applyCredit + ", amount=" + amount + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RefundInvoice.java b/src/main/java/com/maxio/advancedbilling/models/RefundInvoice.java
index 9edfac7b..d10dacc2 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RefundInvoice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RefundInvoice.java
@@ -11,11 +11,13 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for RefundInvoice type.
  */
-public class RefundInvoice {
+public class RefundInvoice
+        extends BaseModel {
     private String amount;
     private String memo;
     private int paymentId;
@@ -204,7 +206,8 @@ public void setVoidInvoice(Boolean voidInvoice) {
     public String toString() {
         return "RefundInvoice [" + "amount=" + amount + ", memo=" + memo + ", paymentId="
                 + paymentId + ", external=" + external + ", applyCredit=" + applyCredit
-                + ", voidInvoice=" + voidInvoice + "]";
+                + ", voidInvoice=" + voidInvoice + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RefundInvoiceEventData.java b/src/main/java/com/maxio/advancedbilling/models/RefundInvoiceEventData.java
index 97d54cc8..e2ba3dc2 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RefundInvoiceEventData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RefundInvoiceEventData.java
@@ -14,12 +14,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for RefundInvoiceEventData type.
  */
-public class RefundInvoiceEventData {
+public class RefundInvoiceEventData
+        extends BaseModel {
     private boolean applyCredit;
     private InvoiceConsolidationLevel consolidationLevel;
     private CreditNote creditNoteAttributes;
@@ -295,7 +297,8 @@ public String toString() {
                 + creditNoteAttributes + ", paymentId=" + paymentId + ", refundAmount="
                 + refundAmount + ", refundId=" + refundId + ", transactionTime=" + transactionTime
                 + ", consolidationLevel=" + consolidationLevel + ", memo=" + memo
-                + ", originalAmount=" + originalAmount + "]";
+                + ", originalAmount=" + originalAmount + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RefundInvoiceRequest.java b/src/main/java/com/maxio/advancedbilling/models/RefundInvoiceRequest.java
index 77abe65a..1727a24d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RefundInvoiceRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RefundInvoiceRequest.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.RefundInvoiceRequestRefund;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for RefundInvoiceRequest type.
  */
-public class RefundInvoiceRequest {
+public class RefundInvoiceRequest
+        extends BaseModel {
     private RefundInvoiceRequestRefund refund;
 
     /**
@@ -55,7 +57,8 @@ public void setRefund(RefundInvoiceRequestRefund refund) {
      */
     @Override
     public String toString() {
-        return "RefundInvoiceRequest [" + "refund=" + refund + "]";
+        return "RefundInvoiceRequest [" + "refund=" + refund + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RefundPrepayment.java b/src/main/java/com/maxio/advancedbilling/models/RefundPrepayment.java
index fb655c00..130b3652 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RefundPrepayment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RefundPrepayment.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.RefundPrepaymentAmount;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for RefundPrepayment type.
  */
-public class RefundPrepayment {
+public class RefundPrepayment
+        extends BaseModel {
     private long amountInCents;
     private RefundPrepaymentAmount amount;
     private String memo;
@@ -134,7 +136,8 @@ public void setExternal(Boolean external) {
     @Override
     public String toString() {
         return "RefundPrepayment [" + "amountInCents=" + amountInCents + ", amount=" + amount
-                + ", memo=" + memo + ", external=" + external + "]";
+                + ", memo=" + memo + ", external=" + external + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RefundPrepaymentAggregatedError.java b/src/main/java/com/maxio/advancedbilling/models/RefundPrepaymentAggregatedError.java
index 84cb016d..fdcf2c86 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RefundPrepaymentAggregatedError.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RefundPrepaymentAggregatedError.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for RefundPrepaymentAggregatedError type.
  */
-public class RefundPrepaymentAggregatedError {
+public class RefundPrepaymentAggregatedError
+        extends BaseModel {
     private PrepaymentAggregatedError refund;
 
     /**
@@ -56,7 +58,8 @@ public void setRefund(PrepaymentAggregatedError refund) {
      */
     @Override
     public String toString() {
-        return "RefundPrepaymentAggregatedError [" + "refund=" + refund + "]";
+        return "RefundPrepaymentAggregatedError [" + "refund=" + refund + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RefundPrepaymentBaseRefundError.java b/src/main/java/com/maxio/advancedbilling/models/RefundPrepaymentBaseRefundError.java
index 759a9746..4ad3907c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RefundPrepaymentBaseRefundError.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RefundPrepaymentBaseRefundError.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for RefundPrepaymentBaseRefundError type.
  */
-public class RefundPrepaymentBaseRefundError {
+public class RefundPrepaymentBaseRefundError
+        extends BaseModel {
     private BaseRefundError refund;
 
     /**
@@ -56,7 +58,8 @@ public void setRefund(BaseRefundError refund) {
      */
     @Override
     public String toString() {
-        return "RefundPrepaymentBaseRefundError [" + "refund=" + refund + "]";
+        return "RefundPrepaymentBaseRefundError [" + "refund=" + refund + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RefundPrepaymentRequest.java b/src/main/java/com/maxio/advancedbilling/models/RefundPrepaymentRequest.java
index 181efab1..16e5e6e8 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RefundPrepaymentRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RefundPrepaymentRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for RefundPrepaymentRequest type.
  */
-public class RefundPrepaymentRequest {
+public class RefundPrepaymentRequest
+        extends BaseModel {
     private RefundPrepayment refund;
 
     /**
@@ -54,7 +56,8 @@ public void setRefund(RefundPrepayment refund) {
      */
     @Override
     public String toString() {
-        return "RefundPrepaymentRequest [" + "refund=" + refund + "]";
+        return "RefundPrepaymentRequest [" + "refund=" + refund + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RefundSuccess.java b/src/main/java/com/maxio/advancedbilling/models/RefundSuccess.java
index 2c9c835d..a9142fd0 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RefundSuccess.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RefundSuccess.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for RefundSuccess type.
  */
-public class RefundSuccess {
+public class RefundSuccess
+        extends BaseModel {
     private int refundId;
     private int gatewayTransactionId;
     private int productId;
@@ -102,7 +104,8 @@ public void setProductId(int productId) {
     @Override
     public String toString() {
         return "RefundSuccess [" + "refundId=" + refundId + ", gatewayTransactionId="
-                + gatewayTransactionId + ", productId=" + productId + "]";
+                + gatewayTransactionId + ", productId=" + productId + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RemovePaymentEventData.java b/src/main/java/com/maxio/advancedbilling/models/RemovePaymentEventData.java
index 3a8584ea..08e08e88 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RemovePaymentEventData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RemovePaymentEventData.java
@@ -15,12 +15,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
 import com.maxio.advancedbilling.models.containers.InvoiceEventPayment;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for RemovePaymentEventData type.
  */
-public class RemovePaymentEventData {
+public class RemovePaymentEventData
+        extends BaseModel {
     private int transactionId;
     private String memo;
     private String originalAmount;
@@ -235,7 +237,8 @@ public String toString() {
         return "RemovePaymentEventData [" + "transactionId=" + transactionId + ", memo=" + memo
                 + ", appliedAmount=" + appliedAmount + ", transactionTime=" + transactionTime
                 + ", paymentMethod=" + paymentMethod + ", prepayment=" + prepayment
-                + ", originalAmount=" + originalAmount + "]";
+                + ", originalAmount=" + originalAmount + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RenewalPreview.java b/src/main/java/com/maxio/advancedbilling/models/RenewalPreview.java
index fa3fca28..590975cc 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RenewalPreview.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RenewalPreview.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 import java.util.List;
 
 /**
  * This is a model class for RenewalPreview type.
  */
-public class RenewalPreview {
+public class RenewalPreview
+        extends BaseModel {
     private ZonedDateTime nextAssessmentAt;
     private Long subtotalInCents;
     private Long totalTaxInCents;
@@ -282,7 +284,8 @@ public String toString() {
                 + ", totalDiscountInCents=" + totalDiscountInCents + ", totalInCents="
                 + totalInCents + ", existingBalanceInCents=" + existingBalanceInCents
                 + ", totalAmountDueInCents=" + totalAmountDueInCents + ", uncalculatedTaxes="
-                + uncalculatedTaxes + ", lineItems=" + lineItems + "]";
+                + uncalculatedTaxes + ", lineItems=" + lineItems + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RenewalPreviewComponent.java b/src/main/java/com/maxio/advancedbilling/models/RenewalPreviewComponent.java
index 24ef4c53..adf68678 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RenewalPreviewComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RenewalPreviewComponent.java
@@ -11,11 +11,13 @@
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.RenewalPreviewComponentComponentId;
 import com.maxio.advancedbilling.models.containers.RenewalPreviewComponentPricePointId;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for RenewalPreviewComponent type.
  */
-public class RenewalPreviewComponent {
+public class RenewalPreviewComponent
+        extends BaseModel {
     private RenewalPreviewComponentComponentId componentId;
     private Integer quantity;
     private RenewalPreviewComponentPricePointId pricePointId;
@@ -121,7 +123,8 @@ public void setPricePointId(RenewalPreviewComponentPricePointId pricePointId) {
     @Override
     public String toString() {
         return "RenewalPreviewComponent [" + "componentId=" + componentId + ", quantity=" + quantity
-                + ", pricePointId=" + pricePointId + "]";
+                + ", pricePointId=" + pricePointId + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RenewalPreviewLineItem.java b/src/main/java/com/maxio/advancedbilling/models/RenewalPreviewLineItem.java
index 57c6512a..4501551d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RenewalPreviewLineItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RenewalPreviewLineItem.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for RenewalPreviewLineItem type.
  */
-public class RenewalPreviewLineItem {
+public class RenewalPreviewLineItem
+        extends BaseModel {
     private LineItemTransactionType transactionType;
     private LineItemKind kind;
     private Long amountInCents;
@@ -365,7 +367,8 @@ public String toString() {
                 + ", productId=" + productId + ", productName=" + productName + ", componentId="
                 + componentId + ", componentHandle=" + componentHandle + ", componentName="
                 + componentName + ", productHandle=" + productHandle + ", periodRangeStart="
-                + periodRangeStart + ", periodRangeEnd=" + periodRangeEnd + "]";
+                + periodRangeStart + ", periodRangeEnd=" + periodRangeEnd
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RenewalPreviewRequest.java b/src/main/java/com/maxio/advancedbilling/models/RenewalPreviewRequest.java
index b954a8c3..107aa98e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RenewalPreviewRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RenewalPreviewRequest.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for RenewalPreviewRequest type.
  */
-public class RenewalPreviewRequest {
+public class RenewalPreviewRequest
+        extends BaseModel {
     private List<RenewalPreviewComponent> components;
 
     /**
@@ -63,7 +65,8 @@ public void setComponents(List<RenewalPreviewComponent> components) {
      */
     @Override
     public String toString() {
-        return "RenewalPreviewRequest [" + "components=" + components + "]";
+        return "RenewalPreviewRequest [" + "components=" + components + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RenewalPreviewResponse.java b/src/main/java/com/maxio/advancedbilling/models/RenewalPreviewResponse.java
index 683dfe9a..de916052 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RenewalPreviewResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RenewalPreviewResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for RenewalPreviewResponse type.
  */
-public class RenewalPreviewResponse {
+public class RenewalPreviewResponse
+        extends BaseModel {
     private RenewalPreview renewalPreview;
 
     /**
@@ -54,7 +56,8 @@ public void setRenewalPreview(RenewalPreview renewalPreview) {
      */
     @Override
     public String toString() {
-        return "RenewalPreviewResponse [" + "renewalPreview=" + renewalPreview + "]";
+        return "RenewalPreviewResponse [" + "renewalPreview=" + renewalPreview
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ReplayWebhooksRequest.java b/src/main/java/com/maxio/advancedbilling/models/ReplayWebhooksRequest.java
index 97300db4..7424b9ff 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ReplayWebhooksRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ReplayWebhooksRequest.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for ReplayWebhooksRequest type.
  */
-public class ReplayWebhooksRequest {
+public class ReplayWebhooksRequest
+        extends BaseModel {
     private List<Long> ids;
 
     /**
@@ -55,7 +57,8 @@ public void setIds(List<Long> ids) {
      */
     @Override
     public String toString() {
-        return "ReplayWebhooksRequest [" + "ids=" + ids + "]";
+        return "ReplayWebhooksRequest [" + "ids=" + ids + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ReplayWebhooksResponse.java b/src/main/java/com/maxio/advancedbilling/models/ReplayWebhooksResponse.java
index e4a64d7c..cc7028ca 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ReplayWebhooksResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ReplayWebhooksResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ReplayWebhooksResponse type.
  */
-public class ReplayWebhooksResponse {
+public class ReplayWebhooksResponse
+        extends BaseModel {
     private String status;
 
     /**
@@ -56,7 +58,8 @@ public void setStatus(String status) {
      */
     @Override
     public String toString() {
-        return "ReplayWebhooksResponse [" + "status=" + status + "]";
+        return "ReplayWebhooksResponse [" + "status=" + status + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ResentInvitation.java b/src/main/java/com/maxio/advancedbilling/models/ResentInvitation.java
index 4abb46f7..2328bb95 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ResentInvitation.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ResentInvitation.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ResentInvitation type.
  */
-public class ResentInvitation {
+public class ResentInvitation
+        extends BaseModel {
     private String lastSentAt;
     private String lastAcceptedAt;
     private String sendInviteLinkText;
@@ -127,7 +129,8 @@ public void setUninvitedCount(Integer uninvitedCount) {
     public String toString() {
         return "ResentInvitation [" + "lastSentAt=" + lastSentAt + ", lastAcceptedAt="
                 + lastAcceptedAt + ", sendInviteLinkText=" + sendInviteLinkText
-                + ", uninvitedCount=" + uninvitedCount + "]";
+                + ", uninvitedCount=" + uninvitedCount + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ResumeOptions.java b/src/main/java/com/maxio/advancedbilling/models/ResumeOptions.java
index 47bec711..b7739172 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ResumeOptions.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ResumeOptions.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ResumeOptions type.
  */
-public class ResumeOptions {
+public class ResumeOptions
+        extends BaseModel {
     private Boolean requireResume;
     private Boolean forgiveBalance;
 
@@ -90,7 +92,7 @@ public void setForgiveBalance(Boolean forgiveBalance) {
     @Override
     public String toString() {
         return "ResumeOptions [" + "requireResume=" + requireResume + ", forgiveBalance="
-                + forgiveBalance + "]";
+                + forgiveBalance + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/RevokedInvitation.java b/src/main/java/com/maxio/advancedbilling/models/RevokedInvitation.java
index 0a06ef63..fb0a8af1 100644
--- a/src/main/java/com/maxio/advancedbilling/models/RevokedInvitation.java
+++ b/src/main/java/com/maxio/advancedbilling/models/RevokedInvitation.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for RevokedInvitation type.
  */
-public class RevokedInvitation {
+public class RevokedInvitation
+        extends BaseModel {
     private String lastSentAt;
     private String lastAcceptedAt;
     private Integer uninvitedCount;
@@ -103,7 +105,8 @@ public void setUninvitedCount(Integer uninvitedCount) {
     @Override
     public String toString() {
         return "RevokedInvitation [" + "lastSentAt=" + lastSentAt + ", lastAcceptedAt="
-                + lastAcceptedAt + ", uninvitedCount=" + uninvitedCount + "]";
+                + lastAcceptedAt + ", uninvitedCount=" + uninvitedCount + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SaleRep.java b/src/main/java/com/maxio/advancedbilling/models/SaleRep.java
index 71e7f892..d5b6289d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SaleRep.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SaleRep.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for SaleRep type.
  */
-public class SaleRep {
+public class SaleRep
+        extends BaseModel {
     private Integer id;
     private String fullName;
     private Integer subscriptionsCount;
@@ -151,7 +153,7 @@ public void setSubscriptions(List<SaleRepSubscription> subscriptions) {
     public String toString() {
         return "SaleRep [" + "id=" + id + ", fullName=" + fullName + ", subscriptionsCount="
                 + subscriptionsCount + ", testMode=" + testMode + ", subscriptions=" + subscriptions
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SaleRepItemMrr.java b/src/main/java/com/maxio/advancedbilling/models/SaleRepItemMrr.java
index 2ca56eef..cac6233a 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SaleRepItemMrr.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SaleRepItemMrr.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SaleRepItemMrr type.
  */
-public class SaleRepItemMrr {
+public class SaleRepItemMrr
+        extends BaseModel {
     private String mrr;
     private String usage;
     private String recurring;
@@ -103,7 +105,7 @@ public void setRecurring(String recurring) {
     @Override
     public String toString() {
         return "SaleRepItemMrr [" + "mrr=" + mrr + ", usage=" + usage + ", recurring=" + recurring
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SaleRepSettings.java b/src/main/java/com/maxio/advancedbilling/models/SaleRepSettings.java
index 6b2bb44f..20ad0771 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SaleRepSettings.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SaleRepSettings.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SaleRepSettings type.
  */
-public class SaleRepSettings {
+public class SaleRepSettings
+        extends BaseModel {
     private String customerName;
     private Integer subscriptionId;
     private String siteLink;
@@ -197,7 +199,8 @@ public String toString() {
         return "SaleRepSettings [" + "customerName=" + customerName + ", subscriptionId="
                 + subscriptionId + ", siteLink=" + siteLink + ", siteName=" + siteName
                 + ", subscriptionMrr=" + subscriptionMrr + ", salesRepId=" + salesRepId
-                + ", salesRepName=" + salesRepName + "]";
+                + ", salesRepName=" + salesRepName + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SaleRepSubscription.java b/src/main/java/com/maxio/advancedbilling/models/SaleRepSubscription.java
index 2e664da6..e296f1c2 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SaleRepSubscription.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SaleRepSubscription.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for SaleRepSubscription type.
  */
-public class SaleRepSubscription {
+public class SaleRepSubscription
+        extends BaseModel {
     private Integer id;
     private String siteName;
     private String subscriptionUrl;
@@ -313,7 +315,8 @@ public String toString() {
         return "SaleRepSubscription [" + "id=" + id + ", siteName=" + siteName
                 + ", subscriptionUrl=" + subscriptionUrl + ", customerName=" + customerName
                 + ", createdAt=" + createdAt + ", mrr=" + mrr + ", usage=" + usage + ", recurring="
-                + recurring + ", lastPayment=" + lastPayment + ", churnDate=" + churnDate + "]";
+                + recurring + ", lastPayment=" + lastPayment + ", churnDate=" + churnDate
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Segment.java b/src/main/java/com/maxio/advancedbilling/models/Segment.java
index 5f0c2d5a..e0a7b380 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Segment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Segment.java
@@ -16,13 +16,15 @@
 import com.maxio.advancedbilling.models.containers.SegmentSegmentProperty2Value;
 import com.maxio.advancedbilling.models.containers.SegmentSegmentProperty3Value;
 import com.maxio.advancedbilling.models.containers.SegmentSegmentProperty4Value;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 import java.util.List;
 
 /**
  * This is a model class for Segment type.
  */
-public class Segment {
+public class Segment
+        extends BaseModel {
     private Integer id;
     private Integer componentId;
     private Integer pricePointId;
@@ -334,7 +336,8 @@ public String toString() {
                 + segmentProperty1Value + ", segmentProperty2Value=" + segmentProperty2Value
                 + ", segmentProperty3Value=" + segmentProperty3Value + ", segmentProperty4Value="
                 + segmentProperty4Value + ", createdAt=" + createdAt + ", updatedAt=" + updatedAt
-                + ", prices=" + prices + "]";
+                + ", prices=" + prices + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SegmentPrice.java b/src/main/java/com/maxio/advancedbilling/models/SegmentPrice.java
index 572a3fdd..9abd1d6b 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SegmentPrice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SegmentPrice.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for SegmentPrice type.
  */
-public class SegmentPrice {
+public class SegmentPrice
+        extends BaseModel {
     private Integer id;
     private Integer componentId;
     private Integer startingQuantity;
@@ -263,7 +265,8 @@ public String toString() {
         return "SegmentPrice [" + "id=" + id + ", componentId=" + componentId
                 + ", startingQuantity=" + startingQuantity + ", endingQuantity=" + endingQuantity
                 + ", unitPrice=" + unitPrice + ", pricePointId=" + pricePointId
-                + ", formattedUnitPrice=" + formattedUnitPrice + ", segmentId=" + segmentId + "]";
+                + ", formattedUnitPrice=" + formattedUnitPrice + ", segmentId=" + segmentId
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SegmentResponse.java b/src/main/java/com/maxio/advancedbilling/models/SegmentResponse.java
index 0625124e..70fb4248 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SegmentResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SegmentResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SegmentResponse type.
  */
-public class SegmentResponse {
+public class SegmentResponse
+        extends BaseModel {
     private Segment segment;
 
     /**
@@ -56,7 +58,8 @@ public void setSegment(Segment segment) {
      */
     @Override
     public String toString() {
-        return "SegmentResponse [" + "segment=" + segment + "]";
+        return "SegmentResponse [" + "segment=" + segment + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Seller.java b/src/main/java/com/maxio/advancedbilling/models/Seller.java
index 73069b97..d85349c3 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Seller.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Seller.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for Seller type.
  */
-public class Seller {
+public class Seller
+        extends BaseModel {
     private String name;
     private InvoiceAddress address;
     private String phone;
@@ -160,7 +162,8 @@ public void unsetLogoUrl() {
     @Override
     public String toString() {
         return "Seller [" + "name=" + name + ", address=" + address + ", phone=" + phone
-                + ", logoUrl=" + logoUrl + "]";
+                + ", logoUrl=" + logoUrl + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SendInvoiceRequest.java b/src/main/java/com/maxio/advancedbilling/models/SendInvoiceRequest.java
index 08dc0249..d80bd0c3 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SendInvoiceRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SendInvoiceRequest.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for SendInvoiceRequest type.
  */
-public class SendInvoiceRequest {
+public class SendInvoiceRequest
+        extends BaseModel {
     private List<String> recipientEmails;
     private List<String> ccRecipientEmails;
     private List<String> bccRecipientEmails;
@@ -105,7 +107,7 @@ public void setBccRecipientEmails(List<String> bccRecipientEmails) {
     public String toString() {
         return "SendInvoiceRequest [" + "recipientEmails=" + recipientEmails
                 + ", ccRecipientEmails=" + ccRecipientEmails + ", bccRecipientEmails="
-                + bccRecipientEmails + "]";
+                + bccRecipientEmails + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ServiceCredit.java b/src/main/java/com/maxio/advancedbilling/models/ServiceCredit.java
index b4857aca..eca83624 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ServiceCredit.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ServiceCredit.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ServiceCredit type.
  */
-public class ServiceCredit {
+public class ServiceCredit
+        extends BaseModel {
     private Integer id;
     private Long amountInCents;
     private Long endingBalanceInCents;
@@ -158,7 +160,7 @@ public void setMemo(String memo) {
     public String toString() {
         return "ServiceCredit [" + "id=" + id + ", amountInCents=" + amountInCents
                 + ", endingBalanceInCents=" + endingBalanceInCents + ", entryType=" + entryType
-                + ", memo=" + memo + "]";
+                + ", memo=" + memo + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ServiceCreditResponse.java b/src/main/java/com/maxio/advancedbilling/models/ServiceCreditResponse.java
index d94e7abb..6868b846 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ServiceCreditResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ServiceCreditResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for ServiceCreditResponse type.
  */
-public class ServiceCreditResponse {
+public class ServiceCreditResponse
+        extends BaseModel {
     private ServiceCredit serviceCredit;
 
     /**
@@ -54,7 +56,8 @@ public void setServiceCredit(ServiceCredit serviceCredit) {
      */
     @Override
     public String toString() {
-        return "ServiceCreditResponse [" + "serviceCredit=" + serviceCredit + "]";
+        return "ServiceCreditResponse [" + "serviceCredit=" + serviceCredit
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/ShippingAddress.java b/src/main/java/com/maxio/advancedbilling/models/ShippingAddress.java
index 66ea6a01..66fb630e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/ShippingAddress.java
+++ b/src/main/java/com/maxio/advancedbilling/models/ShippingAddress.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for ShippingAddress type.
  */
-public class ShippingAddress {
+public class ShippingAddress
+        extends BaseModel {
     private OptionalNullable<String> street;
     private OptionalNullable<String> line2;
     private OptionalNullable<String> city;
@@ -291,7 +293,8 @@ public void unsetCountry() {
     @Override
     public String toString() {
         return "ShippingAddress [" + "street=" + street + ", line2=" + line2 + ", city=" + city
-                + ", state=" + state + ", zip=" + zip + ", country=" + country + "]";
+                + ", state=" + state + ", zip=" + zip + ", country=" + country
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SignupProformaPreview.java b/src/main/java/com/maxio/advancedbilling/models/SignupProformaPreview.java
index d719d11a..b1507ed2 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SignupProformaPreview.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SignupProformaPreview.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SignupProformaPreview type.
  */
-public class SignupProformaPreview {
+public class SignupProformaPreview
+        extends BaseModel {
     private ProformaInvoice currentProformaInvoice;
     private ProformaInvoice nextProformaInvoice;
 
@@ -80,7 +82,8 @@ public void setNextProformaInvoice(ProformaInvoice nextProformaInvoice) {
     @Override
     public String toString() {
         return "SignupProformaPreview [" + "currentProformaInvoice=" + currentProformaInvoice
-                + ", nextProformaInvoice=" + nextProformaInvoice + "]";
+                + ", nextProformaInvoice=" + nextProformaInvoice + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SignupProformaPreviewResponse.java b/src/main/java/com/maxio/advancedbilling/models/SignupProformaPreviewResponse.java
index 5bb07600..1adf854d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SignupProformaPreviewResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SignupProformaPreviewResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SignupProformaPreviewResponse type.
  */
-public class SignupProformaPreviewResponse {
+public class SignupProformaPreviewResponse
+        extends BaseModel {
     private SignupProformaPreview proformaInvoicePreview;
 
     /**
@@ -55,7 +57,8 @@ public void setProformaInvoicePreview(SignupProformaPreview proformaInvoicePrevi
     @Override
     public String toString() {
         return "SignupProformaPreviewResponse [" + "proformaInvoicePreview="
-                + proformaInvoicePreview + "]";
+                + proformaInvoicePreview + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Site.java b/src/main/java/com/maxio/advancedbilling/models/Site.java
index 9c09130e..3e1ba38e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Site.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Site.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for Site type.
  */
-public class Site {
+public class Site
+        extends BaseModel {
     private Integer id;
     private String name;
     private String subdomain;
@@ -411,7 +413,7 @@ public String toString() {
                 + allocationSettings + ", defaultPaymentCollectionMethod="
                 + defaultPaymentCollectionMethod + ", organizationAddress=" + organizationAddress
                 + ", taxConfiguration=" + taxConfiguration + ", netTerms=" + netTerms + ", test="
-                + test + "]";
+                + test + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SiteResponse.java b/src/main/java/com/maxio/advancedbilling/models/SiteResponse.java
index a7484f83..184af97c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SiteResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SiteResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SiteResponse type.
  */
-public class SiteResponse {
+public class SiteResponse
+        extends BaseModel {
     private Site site;
 
     /**
@@ -54,7 +56,8 @@ public void setSite(Site site) {
      */
     @Override
     public String toString() {
-        return "SiteResponse [" + "site=" + site + "]";
+        return "SiteResponse [" + "site=" + site + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SiteStatistics.java b/src/main/java/com/maxio/advancedbilling/models/SiteStatistics.java
index 2e506cfb..4ce7194c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SiteStatistics.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SiteStatistics.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SiteStatistics type.
  */
-public class SiteStatistics {
+public class SiteStatistics
+        extends BaseModel {
     private Integer totalSubscriptions;
     private Integer subscriptionsToday;
     private String totalRevenue;
@@ -294,7 +296,8 @@ public String toString() {
                 + totalActiveSubscriptions + ", totalPastDueSubscriptions="
                 + totalPastDueSubscriptions + ", totalUnpaidSubscriptions="
                 + totalUnpaidSubscriptions + ", totalDunningSubscriptions="
-                + totalDunningSubscriptions + "]";
+                + totalDunningSubscriptions + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SiteSummary.java b/src/main/java/com/maxio/advancedbilling/models/SiteSummary.java
index 84a3dcab..d5ad8308 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SiteSummary.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SiteSummary.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SiteSummary type.
  */
-public class SiteSummary {
+public class SiteSummary
+        extends BaseModel {
     private String sellerName;
     private String siteName;
     private Integer siteId;
@@ -149,7 +151,8 @@ public void setStats(SiteStatistics stats) {
     @Override
     public String toString() {
         return "SiteSummary [" + "sellerName=" + sellerName + ", siteName=" + siteName + ", siteId="
-                + siteId + ", siteCurrency=" + siteCurrency + ", stats=" + stats + "]";
+                + siteId + ", siteCurrency=" + siteCurrency + ", stats=" + stats
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Subscription.java b/src/main/java/com/maxio/advancedbilling/models/Subscription.java
index 7c124a53..81f24df4 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Subscription.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Subscription.java
@@ -13,6 +13,7 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
 import com.maxio.advancedbilling.models.containers.SubscriptionGroup2;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 import java.util.List;
@@ -20,7 +21,8 @@
 /**
  * This is a model class for Subscription type.
  */
-public class Subscription {
+public class Subscription
+        extends BaseModel {
     private Integer id;
     private SubscriptionState state;
     private Long balanceInCents;
@@ -2492,7 +2494,8 @@ public String toString() {
                 + ", currency=" + currency + ", scheduledCancellationAt=" + scheduledCancellationAt
                 + ", creditBalanceInCents=" + creditBalanceInCents + ", prepaymentBalanceInCents="
                 + prepaymentBalanceInCents + ", prepaidConfiguration=" + prepaidConfiguration
-                + ", selfServicePageToken=" + selfServicePageToken + "]";
+                + ", selfServicePageToken=" + selfServicePageToken + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionComponent.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionComponent.java
index 344feba7..91aeb5c9 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionComponent.java
@@ -15,13 +15,15 @@
 import com.maxio.advancedbilling.models.containers.SubscriptionComponentAllocatedQuantity;
 import com.maxio.advancedbilling.models.containers.SubscriptionComponentPricePointType;
 import com.maxio.advancedbilling.models.containers.SubscriptionComponentPricingScheme;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for SubscriptionComponent type.
  */
-public class SubscriptionComponent {
+public class SubscriptionComponent
+        extends BaseModel {
     private Integer id;
     private String name;
     private ComponentKind kind;
@@ -1054,7 +1056,8 @@ public String toString() {
                 + ", useSiteExchangeRate=" + useSiteExchangeRate + ", description=" + description
                 + ", allowFractionalQuantities=" + allowFractionalQuantities + ", subscription="
                 + subscription + ", displayOnHostedPage=" + displayOnHostedPage + ", interval="
-                + interval + ", intervalUnit=" + intervalUnit + "]";
+                + interval + ", intervalUnit=" + intervalUnit + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionComponentAllocationErrorItem.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionComponentAllocationErrorItem.java
index 6667089f..da7bd34e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionComponentAllocationErrorItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionComponentAllocationErrorItem.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionComponentAllocationErrorItem type.
  */
-public class SubscriptionComponentAllocationErrorItem {
+public class SubscriptionComponentAllocationErrorItem
+        extends BaseModel {
     private String kind;
     private String message;
 
@@ -80,7 +82,7 @@ public void setMessage(String message) {
     @Override
     public String toString() {
         return "SubscriptionComponentAllocationErrorItem [" + "kind=" + kind + ", message="
-                + message + "]";
+                + message + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionComponentResponse.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionComponentResponse.java
index d29645d6..5da1eda0 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionComponentResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionComponentResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionComponentResponse type.
  */
-public class SubscriptionComponentResponse {
+public class SubscriptionComponentResponse
+        extends BaseModel {
     private SubscriptionComponent component;
 
     /**
@@ -56,7 +58,8 @@ public void setComponent(SubscriptionComponent component) {
      */
     @Override
     public String toString() {
-        return "SubscriptionComponentResponse [" + "component=" + component + "]";
+        return "SubscriptionComponentResponse [" + "component=" + component
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionComponentSubscription.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionComponentSubscription.java
index cf256a90..f5c48033 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionComponentSubscription.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionComponentSubscription.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for SubscriptionComponentSubscription type.
  */
-public class SubscriptionComponentSubscription {
+public class SubscriptionComponentSubscription
+        extends BaseModel {
     private SubscriptionState state;
     private ZonedDateTime updatedAt;
 
@@ -176,7 +178,7 @@ public void setUpdatedAt(ZonedDateTime updatedAt) {
     @Override
     public String toString() {
         return "SubscriptionComponentSubscription [" + "state=" + state + ", updatedAt=" + updatedAt
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionCustomPrice.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionCustomPrice.java
index 10459e40..a539822e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionCustomPrice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionCustomPrice.java
@@ -15,11 +15,13 @@
 import com.maxio.advancedbilling.models.containers.SubscriptionCustomPricePriceInCents;
 import com.maxio.advancedbilling.models.containers.SubscriptionCustomPriceTrialInterval;
 import com.maxio.advancedbilling.models.containers.SubscriptionCustomPriceTrialPriceInCents;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionCustomPrice type.
  */
-public class SubscriptionCustomPrice {
+public class SubscriptionCustomPrice
+        extends BaseModel {
     private String name;
     private String handle;
     private SubscriptionCustomPricePriceInCents priceInCents;
@@ -371,7 +373,7 @@ public String toString() {
                 + ", initialChargeInCents=" + initialChargeInCents + ", initialChargeAfterTrial="
                 + initialChargeAfterTrial + ", expirationInterval=" + expirationInterval
                 + ", expirationIntervalUnit=" + expirationIntervalUnit + ", taxIncluded="
-                + taxIncluded + "]";
+                + taxIncluded + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroup.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroup.java
index 142467cd..98adb207 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroup.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroup.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 import java.util.List;
 
 /**
  * This is a model class for SubscriptionGroup type.
  */
-public class SubscriptionGroup {
+public class SubscriptionGroup
+        extends BaseModel {
     private Integer customerId;
     private SubscriptionGroupPaymentProfile paymentProfile;
     private String paymentCollectionMethod;
@@ -157,7 +159,8 @@ public void setCreatedAt(ZonedDateTime createdAt) {
     public String toString() {
         return "SubscriptionGroup [" + "customerId=" + customerId + ", paymentProfile="
                 + paymentProfile + ", paymentCollectionMethod=" + paymentCollectionMethod
-                + ", subscriptionIds=" + subscriptionIds + ", createdAt=" + createdAt + "]";
+                + ", subscriptionIds=" + subscriptionIds + ", createdAt=" + createdAt
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupBalances.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupBalances.java
index bd007223..eaf00c32 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupBalances.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupBalances.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionGroupBalances type.
  */
-public class SubscriptionGroupBalances {
+public class SubscriptionGroupBalances
+        extends BaseModel {
     private AccountBalance prepayments;
     private AccountBalance serviceCredits;
     private AccountBalance openInvoices;
@@ -127,7 +129,7 @@ public void setPendingDiscounts(AccountBalance pendingDiscounts) {
     public String toString() {
         return "SubscriptionGroupBalances [" + "prepayments=" + prepayments + ", serviceCredits="
                 + serviceCredits + ", openInvoices=" + openInvoices + ", pendingDiscounts="
-                + pendingDiscounts + "]";
+                + pendingDiscounts + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupBankAccount.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupBankAccount.java
index fdb4653b..23b8ad4e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupBankAccount.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupBankAccount.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionGroupBankAccount type.
  */
-public class SubscriptionGroupBankAccount {
+public class SubscriptionGroupBankAccount
+        extends BaseModel {
     private String bankName;
     private String bankAccountNumber;
     private String bankRoutingNumber;
@@ -437,7 +439,8 @@ public String toString() {
                 + ", billingCity=" + billingCity + ", billingState=" + billingState
                 + ", billingZip=" + billingZip + ", billingCountry=" + billingCountry
                 + ", chargifyToken=" + chargifyToken + ", currentVault=" + currentVault
-                + ", gatewayHandle=" + gatewayHandle + "]";
+                + ", gatewayHandle=" + gatewayHandle + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupComponentCustomPrice.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupComponentCustomPrice.java
index 86626b26..a29277ae 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupComponentCustomPrice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupComponentCustomPrice.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for SubscriptionGroupComponentCustomPrice type.
  */
-public class SubscriptionGroupComponentCustomPrice {
+public class SubscriptionGroupComponentCustomPrice
+        extends BaseModel {
     private PricingScheme pricingScheme;
     private List<Price> prices;
     private List<ComponentCustomPrice> overagePricing;
@@ -110,7 +112,8 @@ public void setOveragePricing(List<ComponentCustomPrice> overagePricing) {
     @Override
     public String toString() {
         return "SubscriptionGroupComponentCustomPrice [" + "pricingScheme=" + pricingScheme
-                + ", prices=" + prices + ", overagePricing=" + overagePricing + "]";
+                + ", prices=" + prices + ", overagePricing=" + overagePricing
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupCreditCard.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupCreditCard.java
index 908227b3..930f663a 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupCreditCard.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupCreditCard.java
@@ -12,11 +12,13 @@
 import com.maxio.advancedbilling.models.containers.SubscriptionGroupCreditCardExpirationMonth;
 import com.maxio.advancedbilling.models.containers.SubscriptionGroupCreditCardExpirationYear;
 import com.maxio.advancedbilling.models.containers.SubscriptionGroupCreditCardFullNumber;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionGroupCreditCard type.
  */
-public class SubscriptionGroupCreditCard {
+public class SubscriptionGroupCreditCard
+        extends BaseModel {
     private SubscriptionGroupCreditCardFullNumber fullNumber;
     private SubscriptionGroupCreditCardExpirationMonth expirationMonth;
     private SubscriptionGroupCreditCardExpirationYear expirationYear;
@@ -511,7 +513,8 @@ public String toString() {
                 + billingAddress2 + ", billingCity=" + billingCity + ", billingState="
                 + billingState + ", billingZip=" + billingZip + ", billingCountry=" + billingCountry
                 + ", lastFour=" + lastFour + ", cardType=" + cardType + ", customerVaultToken="
-                + customerVaultToken + ", cvv=" + cvv + ", paymentType=" + paymentType + "]";
+                + customerVaultToken + ", cvv=" + cvv + ", paymentType=" + paymentType
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupCustomer.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupCustomer.java
index 633be1f1..4e97ef41 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupCustomer.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupCustomer.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionGroupCustomer type.
  */
-public class SubscriptionGroupCustomer {
+public class SubscriptionGroupCustomer
+        extends BaseModel {
     private String firstName;
     private String lastName;
     private String organization;
@@ -150,7 +152,7 @@ public void setReference(String reference) {
     public String toString() {
         return "SubscriptionGroupCustomer [" + "firstName=" + firstName + ", lastName=" + lastName
                 + ", organization=" + organization + ", email=" + email + ", reference=" + reference
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupItem.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupItem.java
index 68954140..ac73718c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupItem.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for SubscriptionGroupItem type.
  */
-public class SubscriptionGroupItem {
+public class SubscriptionGroupItem
+        extends BaseModel {
     private Integer id;
     private OptionalNullable<String> reference;
     private Integer productId;
@@ -347,7 +349,8 @@ public String toString() {
                 + productId + ", productHandle=" + productHandle + ", productPricePointId="
                 + productPricePointId + ", productPricePointHandle=" + productPricePointHandle
                 + ", currency=" + currency + ", couponCode=" + couponCode + ", totalRevenueInCents="
-                + totalRevenueInCents + ", balanceInCents=" + balanceInCents + "]";
+                + totalRevenueInCents + ", balanceInCents=" + balanceInCents
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupMemberError.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupMemberError.java
index c4ebcee0..2a6ce894 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupMemberError.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupMemberError.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionGroupMemberError type.
  */
-public class SubscriptionGroupMemberError {
+public class SubscriptionGroupMemberError
+        extends BaseModel {
     private Integer id;
     private String type;
     private String message;
@@ -103,7 +105,7 @@ public void setMessage(String message) {
     @Override
     public String toString() {
         return "SubscriptionGroupMemberError [" + "id=" + id + ", type=" + type + ", message="
-                + message + "]";
+                + message + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupPaymentProfile.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupPaymentProfile.java
index 565fb566..aa453c15 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupPaymentProfile.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupPaymentProfile.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionGroupPaymentProfile type.
  */
-public class SubscriptionGroupPaymentProfile {
+public class SubscriptionGroupPaymentProfile
+        extends BaseModel {
     private Integer id;
     private String firstName;
     private String lastName;
@@ -126,7 +128,8 @@ public void setMaskedCardNumber(String maskedCardNumber) {
     @Override
     public String toString() {
         return "SubscriptionGroupPaymentProfile [" + "id=" + id + ", firstName=" + firstName
-                + ", lastName=" + lastName + ", maskedCardNumber=" + maskedCardNumber + "]";
+                + ", lastName=" + lastName + ", maskedCardNumber=" + maskedCardNumber
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupPrepayment.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupPrepayment.java
index 40200440..c49e3352 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupPrepayment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupPrepayment.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionGroupPrepayment type.
  */
-public class SubscriptionGroupPrepayment {
+public class SubscriptionGroupPrepayment
+        extends BaseModel {
     private int amount;
     private String details;
     private String memo;
@@ -121,7 +123,8 @@ public void setMethod(SubscriptionGroupPrepaymentMethod method) {
     @Override
     public String toString() {
         return "SubscriptionGroupPrepayment [" + "amount=" + amount + ", details=" + details
-                + ", memo=" + memo + ", method=" + method + "]";
+                + ", memo=" + memo + ", method=" + method + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupPrepaymentRequest.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupPrepaymentRequest.java
index 7560fc48..3396e287 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupPrepaymentRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupPrepaymentRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionGroupPrepaymentRequest type.
  */
-public class SubscriptionGroupPrepaymentRequest {
+public class SubscriptionGroupPrepaymentRequest
+        extends BaseModel {
     private SubscriptionGroupPrepayment prepayment;
 
     /**
@@ -54,7 +56,8 @@ public void setPrepayment(SubscriptionGroupPrepayment prepayment) {
      */
     @Override
     public String toString() {
-        return "SubscriptionGroupPrepaymentRequest [" + "prepayment=" + prepayment + "]";
+        return "SubscriptionGroupPrepaymentRequest [" + "prepayment=" + prepayment
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupPrepaymentResponse.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupPrepaymentResponse.java
index e4d08bb1..5d968ca3 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupPrepaymentResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupPrepaymentResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionGroupPrepaymentResponse type.
  */
-public class SubscriptionGroupPrepaymentResponse {
+public class SubscriptionGroupPrepaymentResponse
+        extends BaseModel {
     private Integer id;
     private Long amountInCents;
     private Long endingBalanceInCents;
@@ -158,7 +160,8 @@ public void setMemo(String memo) {
     public String toString() {
         return "SubscriptionGroupPrepaymentResponse [" + "id=" + id + ", amountInCents="
                 + amountInCents + ", endingBalanceInCents=" + endingBalanceInCents + ", entryType="
-                + entryType + ", memo=" + memo + "]";
+                + entryType + ", memo=" + memo + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupResponse.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupResponse.java
index fa6c8d31..7deb5204 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionGroupResponse type.
  */
-public class SubscriptionGroupResponse {
+public class SubscriptionGroupResponse
+        extends BaseModel {
     private SubscriptionGroup subscriptionGroup;
 
     /**
@@ -54,7 +56,8 @@ public void setSubscriptionGroup(SubscriptionGroup subscriptionGroup) {
      */
     @Override
     public String toString() {
-        return "SubscriptionGroupResponse [" + "subscriptionGroup=" + subscriptionGroup + "]";
+        return "SubscriptionGroupResponse [" + "subscriptionGroup=" + subscriptionGroup
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignup.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignup.java
index 43e269c6..92c7d2aa 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignup.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignup.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for SubscriptionGroupSignup type.
  */
-public class SubscriptionGroupSignup {
+public class SubscriptionGroupSignup
+        extends BaseModel {
     private Integer paymentProfileId;
     private Integer payerId;
     private String payerReference;
@@ -229,7 +231,8 @@ public String toString() {
                 + ", payerReference=" + payerReference + ", paymentCollectionMethod="
                 + paymentCollectionMethod + ", payerAttributes=" + payerAttributes
                 + ", creditCardAttributes=" + creditCardAttributes + ", bankAccountAttributes="
-                + bankAccountAttributes + "]";
+                + bankAccountAttributes + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupComponent.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupComponent.java
index 650ede43..1ba528bd 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupComponent.java
@@ -13,11 +13,13 @@
 import com.maxio.advancedbilling.models.containers.SubscriptionGroupSignupComponentComponentId;
 import com.maxio.advancedbilling.models.containers.SubscriptionGroupSignupComponentPricePointId;
 import com.maxio.advancedbilling.models.containers.SubscriptionGroupSignupComponentUnitBalance;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionGroupSignupComponent type.
  */
-public class SubscriptionGroupSignupComponent {
+public class SubscriptionGroupSignupComponent
+        extends BaseModel {
     private SubscriptionGroupSignupComponentComponentId componentId;
     private SubscriptionGroupSignupComponentAllocatedQuantity allocatedQuantity;
     private SubscriptionGroupSignupComponentUnitBalance unitBalance;
@@ -161,7 +163,8 @@ public void setCustomPrice(SubscriptionGroupComponentCustomPrice customPrice) {
     public String toString() {
         return "SubscriptionGroupSignupComponent [" + "componentId=" + componentId
                 + ", allocatedQuantity=" + allocatedQuantity + ", unitBalance=" + unitBalance
-                + ", pricePointId=" + pricePointId + ", customPrice=" + customPrice + "]";
+                + ", pricePointId=" + pricePointId + ", customPrice=" + customPrice
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupError.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupError.java
index 55933fad..dc128746 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupError.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupError.java
@@ -9,13 +9,15 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 import java.util.Map;
 
 /**
  * This is a model class for SubscriptionGroupSignupError type.
  */
-public class SubscriptionGroupSignupError {
+public class SubscriptionGroupSignupError
+        extends BaseModel {
     private Map<String, SubscriptionGroupSubscriptionError> subscriptions;
     private String payerReference;
     private PayerError payer;
@@ -180,7 +182,7 @@ public String toString() {
         return "SubscriptionGroupSignupError [" + "subscriptions=" + subscriptions
                 + ", payerReference=" + payerReference + ", payer=" + payer + ", subscriptionGroup="
                 + subscriptionGroup + ", paymentProfileId=" + paymentProfileId + ", payerId="
-                + payerId + "]";
+                + payerId + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupFailure.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupFailure.java
index 6de92962..cb019c34 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupFailure.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupFailure.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionGroupSignupFailure type.
  */
-public class SubscriptionGroupSignupFailure {
+public class SubscriptionGroupSignupFailure
+        extends BaseModel {
     private SubscriptionGroupSignupFailureData subscriptionGroup;
     private String customer;
 
@@ -80,7 +82,8 @@ public void setCustomer(String customer) {
     @Override
     public String toString() {
         return "SubscriptionGroupSignupFailure [" + "subscriptionGroup=" + subscriptionGroup
-                + ", customer=" + customer + "]";
+                + ", customer=" + customer + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupFailureData.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupFailureData.java
index 338c073a..7ea92743 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupFailureData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupFailureData.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for SubscriptionGroupSignupFailureData type.
  */
-public class SubscriptionGroupSignupFailureData {
+public class SubscriptionGroupSignupFailureData
+        extends BaseModel {
     private Integer payerId;
     private String payerReference;
     private Integer paymentProfileId;
@@ -223,7 +225,7 @@ public String toString() {
                 + ", paymentCollectionMethod=" + paymentCollectionMethod + ", payerAttributes="
                 + payerAttributes + ", creditCardAttributes=" + creditCardAttributes
                 + ", bankAccountAttributes=" + bankAccountAttributes + ", subscriptions="
-                + subscriptions + "]";
+                + subscriptions + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupItem.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupItem.java
index 8a990488..5f81713d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupItem.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupItem.java
@@ -9,13 +9,15 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 import java.util.Map;
 
 /**
  * This is a model class for SubscriptionGroupSignupItem type.
  */
-public class SubscriptionGroupSignupItem {
+public class SubscriptionGroupSignupItem
+        extends BaseModel {
     private String productHandle;
     private Integer productId;
     private Integer productPricePointId;
@@ -380,7 +382,7 @@ public String toString() {
                 + ", reference=" + reference + ", primary=" + primary + ", currency=" + currency
                 + ", couponCodes=" + couponCodes + ", components=" + components + ", customPrice="
                 + customPrice + ", calendarBilling=" + calendarBilling + ", metafields="
-                + metafields + "]";
+                + metafields + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupRequest.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupRequest.java
index 8aa2e853..c4d93ccd 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionGroupSignupRequest type.
  */
-public class SubscriptionGroupSignupRequest {
+public class SubscriptionGroupSignupRequest
+        extends BaseModel {
     private SubscriptionGroupSignup subscriptionGroup;
 
     /**
@@ -54,7 +56,8 @@ public void setSubscriptionGroup(SubscriptionGroupSignup subscriptionGroup) {
      */
     @Override
     public String toString() {
-        return "SubscriptionGroupSignupRequest [" + "subscriptionGroup=" + subscriptionGroup + "]";
+        return "SubscriptionGroupSignupRequest [" + "subscriptionGroup=" + subscriptionGroup
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupResponse.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupResponse.java
index ea918511..ecae99d5 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupResponse.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 import java.util.List;
 
 /**
  * This is a model class for SubscriptionGroupSignupResponse type.
  */
-public class SubscriptionGroupSignupResponse {
+public class SubscriptionGroupSignupResponse
+        extends BaseModel {
     private String uid;
     private Integer scheme;
     private Integer customerId;
@@ -305,7 +307,8 @@ public String toString() {
                 + ", subscriptionIds=" + subscriptionIds + ", primarySubscriptionId="
                 + primarySubscriptionId + ", nextAssessmentAt=" + nextAssessmentAt + ", state="
                 + state + ", cancelAtEndOfPeriod=" + cancelAtEndOfPeriod + ", subscriptions="
-                + subscriptions + ", paymentCollectionMethod=" + paymentCollectionMethod + "]";
+                + subscriptions + ", paymentCollectionMethod=" + paymentCollectionMethod
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupSuccess.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupSuccess.java
index ce712144..97cf16cf 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupSuccess.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupSuccess.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionGroupSignupSuccess type.
  */
-public class SubscriptionGroupSignupSuccess {
+public class SubscriptionGroupSignupSuccess
+        extends BaseModel {
     private SubscriptionGroupSignupSuccessData subscriptionGroup;
     private Customer customer;
 
@@ -80,7 +82,8 @@ public void setCustomer(Customer customer) {
     @Override
     public String toString() {
         return "SubscriptionGroupSignupSuccess [" + "subscriptionGroup=" + subscriptionGroup
-                + ", customer=" + customer + "]";
+                + ", customer=" + customer + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupSuccessData.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupSuccessData.java
index 0c683503..f2e09ed6 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupSuccessData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSignupSuccessData.java
@@ -11,13 +11,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 import java.util.List;
 
 /**
  * This is a model class for SubscriptionGroupSignupSuccessData type.
  */
-public class SubscriptionGroupSignupSuccessData {
+public class SubscriptionGroupSignupSuccessData
+        extends BaseModel {
     private String uid;
     private int scheme;
     private int customerId;
@@ -241,7 +243,8 @@ public String toString() {
                 + ", customerId=" + customerId + ", paymentProfileId=" + paymentProfileId
                 + ", subscriptionIds=" + subscriptionIds + ", primarySubscriptionId="
                 + primarySubscriptionId + ", nextAssessmentAt=" + nextAssessmentAt + ", state="
-                + state + ", cancelAtEndOfPeriod=" + cancelAtEndOfPeriod + "]";
+                + state + ", cancelAtEndOfPeriod=" + cancelAtEndOfPeriod + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSubscriptionError.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSubscriptionError.java
index be860d0c..7ab92023 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSubscriptionError.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupSubscriptionError.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for SubscriptionGroupSubscriptionError type.
  */
-public class SubscriptionGroupSubscriptionError {
+public class SubscriptionGroupSubscriptionError
+        extends BaseModel {
     private List<String> product;
     private List<String> productPricePointId;
     private List<String> paymentProfile;
@@ -129,7 +131,7 @@ public String toString() {
         return "SubscriptionGroupSubscriptionError [" + "product=" + product
                 + ", productPricePointId=" + productPricePointId + ", paymentProfile="
                 + paymentProfile + ", paymentProfileChargifyToken=" + paymentProfileChargifyToken
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupUpdateError.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupUpdateError.java
index 7ecbc9b6..bb6d01f6 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupUpdateError.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionGroupUpdateError.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for SubscriptionGroupUpdateError type.
  */
-public class SubscriptionGroupUpdateError {
+public class SubscriptionGroupUpdateError
+        extends BaseModel {
     private List<SubscriptionGroupMemberError> members;
 
     /**
@@ -57,7 +59,8 @@ public void setMembers(List<SubscriptionGroupMemberError> members) {
      */
     @Override
     public String toString() {
-        return "SubscriptionGroupUpdateError [" + "members=" + members + "]";
+        return "SubscriptionGroupUpdateError [" + "members=" + members + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionIncludedCoupon.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionIncludedCoupon.java
index c95d791c..3dab038c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionIncludedCoupon.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionIncludedCoupon.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for SubscriptionIncludedCoupon type.
  */
-public class SubscriptionIncludedCoupon {
+public class SubscriptionIncludedCoupon
+        extends BaseModel {
     private String code;
     private Integer useCount;
     private Integer usesAllowed;
@@ -270,7 +272,7 @@ public String toString() {
         return "SubscriptionIncludedCoupon [" + "code=" + code + ", useCount=" + useCount
                 + ", usesAllowed=" + usesAllowed + ", expiresAt=" + expiresAt + ", recurring="
                 + recurring + ", amountInCents=" + amountInCents + ", percentage=" + percentage
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionMRR.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionMRR.java
index b6a939a4..d0cbfba7 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionMRR.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionMRR.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionMRR type.
  */
-public class SubscriptionMRR {
+public class SubscriptionMRR
+        extends BaseModel {
     private int subscriptionId;
     private long mrrAmountInCents;
     private SubscriptionMRRBreakout breakouts;
@@ -101,7 +103,8 @@ public void setBreakouts(SubscriptionMRRBreakout breakouts) {
     @Override
     public String toString() {
         return "SubscriptionMRR [" + "subscriptionId=" + subscriptionId + ", mrrAmountInCents="
-                + mrrAmountInCents + ", breakouts=" + breakouts + "]";
+                + mrrAmountInCents + ", breakouts=" + breakouts + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionMRRBreakout.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionMRRBreakout.java
index 5c63ee57..2b0d27d3 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionMRRBreakout.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionMRRBreakout.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionMRRBreakout type.
  */
-public class SubscriptionMRRBreakout {
+public class SubscriptionMRRBreakout
+        extends BaseModel {
     private long planAmountInCents;
     private long usageAmountInCents;
 
@@ -77,7 +79,8 @@ public void setUsageAmountInCents(long usageAmountInCents) {
     @Override
     public String toString() {
         return "SubscriptionMRRBreakout [" + "planAmountInCents=" + planAmountInCents
-                + ", usageAmountInCents=" + usageAmountInCents + "]";
+                + ", usageAmountInCents=" + usageAmountInCents + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionMRRResponse.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionMRRResponse.java
index b1b7983f..a1f21890 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionMRRResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionMRRResponse.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for SubscriptionMRRResponse type.
  */
-public class SubscriptionMRRResponse {
+public class SubscriptionMRRResponse
+        extends BaseModel {
     private List<SubscriptionMRR> subscriptionsMrr;
 
     /**
@@ -55,7 +57,8 @@ public void setSubscriptionsMrr(List<SubscriptionMRR> subscriptionsMrr) {
      */
     @Override
     public String toString() {
-        return "SubscriptionMRRResponse [" + "subscriptionsMrr=" + subscriptionsMrr + "]";
+        return "SubscriptionMRRResponse [" + "subscriptionsMrr=" + subscriptionsMrr
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionMigrationPreview.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionMigrationPreview.java
index fd100daf..1686e0aa 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionMigrationPreview.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionMigrationPreview.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionMigrationPreview type.
  */
-public class SubscriptionMigrationPreview {
+public class SubscriptionMigrationPreview
+        extends BaseModel {
     private Long proratedAdjustmentInCents;
     private Long chargeInCents;
     private Long paymentDueInCents;
@@ -138,7 +140,8 @@ public String toString() {
         return "SubscriptionMigrationPreview [" + "proratedAdjustmentInCents="
                 + proratedAdjustmentInCents + ", chargeInCents=" + chargeInCents
                 + ", paymentDueInCents=" + paymentDueInCents + ", creditAppliedInCents="
-                + creditAppliedInCents + "]";
+                + creditAppliedInCents + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionMigrationPreviewOptions.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionMigrationPreviewOptions.java
index fbf7e6fe..c7b4e664 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionMigrationPreviewOptions.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionMigrationPreviewOptions.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for SubscriptionMigrationPreviewOptions type.
  */
-public class SubscriptionMigrationPreviewOptions {
+public class SubscriptionMigrationPreviewOptions
+        extends BaseModel {
     private Integer productId;
     private Integer productPricePointId;
     private Boolean includeTrial;
@@ -322,7 +324,8 @@ public String toString() {
                 + ", includeInitialCharge=" + includeInitialCharge + ", includeCoupons="
                 + includeCoupons + ", preservePeriod=" + preservePeriod + ", productHandle="
                 + productHandle + ", productPricePointHandle=" + productPricePointHandle
-                + ", proration=" + proration + ", prorationDate=" + prorationDate + "]";
+                + ", proration=" + proration + ", prorationDate=" + prorationDate
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionMigrationPreviewRequest.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionMigrationPreviewRequest.java
index 52e0bc3a..35b8acc5 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionMigrationPreviewRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionMigrationPreviewRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionMigrationPreviewRequest type.
  */
-public class SubscriptionMigrationPreviewRequest {
+public class SubscriptionMigrationPreviewRequest
+        extends BaseModel {
     private SubscriptionMigrationPreviewOptions migration;
 
     /**
@@ -54,7 +56,8 @@ public void setMigration(SubscriptionMigrationPreviewOptions migration) {
      */
     @Override
     public String toString() {
-        return "SubscriptionMigrationPreviewRequest [" + "migration=" + migration + "]";
+        return "SubscriptionMigrationPreviewRequest [" + "migration=" + migration
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionMigrationPreviewResponse.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionMigrationPreviewResponse.java
index b2c28812..4a9d61ad 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionMigrationPreviewResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionMigrationPreviewResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionMigrationPreviewResponse type.
  */
-public class SubscriptionMigrationPreviewResponse {
+public class SubscriptionMigrationPreviewResponse
+        extends BaseModel {
     private SubscriptionMigrationPreview migration;
 
     /**
@@ -54,7 +56,8 @@ public void setMigration(SubscriptionMigrationPreview migration) {
      */
     @Override
     public String toString() {
-        return "SubscriptionMigrationPreviewResponse [" + "migration=" + migration + "]";
+        return "SubscriptionMigrationPreviewResponse [" + "migration=" + migration
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionNote.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionNote.java
index 313f270d..b4597286 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionNote.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionNote.java
@@ -12,12 +12,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for SubscriptionNote type.
  */
-public class SubscriptionNote {
+public class SubscriptionNote
+        extends BaseModel {
     private Integer id;
     private String body;
     private Integer subscriptionId;
@@ -181,7 +183,8 @@ public void setSticky(Boolean sticky) {
     public String toString() {
         return "SubscriptionNote [" + "id=" + id + ", body=" + body + ", subscriptionId="
                 + subscriptionId + ", createdAt=" + createdAt + ", updatedAt=" + updatedAt
-                + ", sticky=" + sticky + "]";
+                + ", sticky=" + sticky + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionNoteResponse.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionNoteResponse.java
index a28388e3..feaf0c56 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionNoteResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionNoteResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionNoteResponse type.
  */
-public class SubscriptionNoteResponse {
+public class SubscriptionNoteResponse
+        extends BaseModel {
     private SubscriptionNote note;
 
     /**
@@ -54,7 +56,8 @@ public void setNote(SubscriptionNote note) {
      */
     @Override
     public String toString() {
-        return "SubscriptionNoteResponse [" + "note=" + note + "]";
+        return "SubscriptionNoteResponse [" + "note=" + note + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionPreview.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionPreview.java
index 40b36555..04b0358d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionPreview.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionPreview.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionPreview type.
  */
-public class SubscriptionPreview {
+public class SubscriptionPreview
+        extends BaseModel {
     private BillingManifest currentBillingManifest;
     private BillingManifest nextBillingManifest;
 
@@ -80,7 +82,8 @@ public void setNextBillingManifest(BillingManifest nextBillingManifest) {
     @Override
     public String toString() {
         return "SubscriptionPreview [" + "currentBillingManifest=" + currentBillingManifest
-                + ", nextBillingManifest=" + nextBillingManifest + "]";
+                + ", nextBillingManifest=" + nextBillingManifest + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionPreviewResponse.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionPreviewResponse.java
index 24d26bf6..8ad74f15 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionPreviewResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionPreviewResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionPreviewResponse type.
  */
-public class SubscriptionPreviewResponse {
+public class SubscriptionPreviewResponse
+        extends BaseModel {
     private SubscriptionPreview subscriptionPreview;
 
     /**
@@ -54,7 +56,8 @@ public void setSubscriptionPreview(SubscriptionPreview subscriptionPreview) {
      */
     @Override
     public String toString() {
-        return "SubscriptionPreviewResponse [" + "subscriptionPreview=" + subscriptionPreview + "]";
+        return "SubscriptionPreviewResponse [" + "subscriptionPreview=" + subscriptionPreview
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionProductChange.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionProductChange.java
index cec56a22..60c71fe1 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionProductChange.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionProductChange.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionProductChange type.
  */
-public class SubscriptionProductChange {
+public class SubscriptionProductChange
+        extends BaseModel {
     private int previousProductId;
     private int newProductId;
 
@@ -80,7 +82,8 @@ public void setNewProductId(int newProductId) {
     @Override
     public String toString() {
         return "SubscriptionProductChange [" + "previousProductId=" + previousProductId
-                + ", newProductId=" + newProductId + "]";
+                + ", newProductId=" + newProductId + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionProductMigration.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionProductMigration.java
index f6fba24d..7807223c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionProductMigration.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionProductMigration.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionProductMigration type.
  */
-public class SubscriptionProductMigration {
+public class SubscriptionProductMigration
+        extends BaseModel {
     private Integer productId;
     private Integer productPricePointId;
     private Boolean includeTrial;
@@ -291,7 +293,8 @@ public String toString() {
                 + ", includeInitialCharge=" + includeInitialCharge + ", includeCoupons="
                 + includeCoupons + ", preservePeriod=" + preservePeriod + ", productHandle="
                 + productHandle + ", productPricePointHandle=" + productPricePointHandle
-                + ", proration=" + proration + "]";
+                + ", proration=" + proration + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionProductMigrationRequest.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionProductMigrationRequest.java
index 9e2dc01e..5f0eac47 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionProductMigrationRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionProductMigrationRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionProductMigrationRequest type.
  */
-public class SubscriptionProductMigrationRequest {
+public class SubscriptionProductMigrationRequest
+        extends BaseModel {
     private SubscriptionProductMigration migration;
 
     /**
@@ -54,7 +56,8 @@ public void setMigration(SubscriptionProductMigration migration) {
      */
     @Override
     public String toString() {
-        return "SubscriptionProductMigrationRequest [" + "migration=" + migration + "]";
+        return "SubscriptionProductMigrationRequest [" + "migration=" + migration
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionResponse.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionResponse.java
index 1c218048..f5ebd988 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionResponse type.
  */
-public class SubscriptionResponse {
+public class SubscriptionResponse
+        extends BaseModel {
     private Subscription subscription;
 
     /**
@@ -56,7 +58,8 @@ public void setSubscription(Subscription subscription) {
      */
     @Override
     public String toString() {
-        return "SubscriptionResponse [" + "subscription=" + subscription + "]";
+        return "SubscriptionResponse [" + "subscription=" + subscription + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/SubscriptionStateChange.java b/src/main/java/com/maxio/advancedbilling/models/SubscriptionStateChange.java
index 03f28461..8174879f 100644
--- a/src/main/java/com/maxio/advancedbilling/models/SubscriptionStateChange.java
+++ b/src/main/java/com/maxio/advancedbilling/models/SubscriptionStateChange.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for SubscriptionStateChange type.
  */
-public class SubscriptionStateChange {
+public class SubscriptionStateChange
+        extends BaseModel {
     private String previousSubscriptionState;
     private String newSubscriptionState;
 
@@ -81,7 +83,7 @@ public void setNewSubscriptionState(String newSubscriptionState) {
     public String toString() {
         return "SubscriptionStateChange [" + "previousSubscriptionState="
                 + previousSubscriptionState + ", newSubscriptionState=" + newSubscriptionState
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/TaxConfiguration.java b/src/main/java/com/maxio/advancedbilling/models/TaxConfiguration.java
index 1652e31b..1b0ddf84 100644
--- a/src/main/java/com/maxio/advancedbilling/models/TaxConfiguration.java
+++ b/src/main/java/com/maxio/advancedbilling/models/TaxConfiguration.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for TaxConfiguration type.
  */
-public class TaxConfiguration {
+public class TaxConfiguration
+        extends BaseModel {
     private TaxConfigurationKind kind;
     private TaxDestinationAddress destinationAddress;
     private Boolean fullyConfigured;
@@ -111,7 +113,8 @@ public void setFullyConfigured(Boolean fullyConfigured) {
     @Override
     public String toString() {
         return "TaxConfiguration [" + "kind=" + kind + ", destinationAddress=" + destinationAddress
-                + ", fullyConfigured=" + fullyConfigured + "]";
+                + ", fullyConfigured=" + fullyConfigured + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/TooManyManagementLinkRequests.java b/src/main/java/com/maxio/advancedbilling/models/TooManyManagementLinkRequests.java
index 86b75e94..109044f6 100644
--- a/src/main/java/com/maxio/advancedbilling/models/TooManyManagementLinkRequests.java
+++ b/src/main/java/com/maxio/advancedbilling/models/TooManyManagementLinkRequests.java
@@ -11,12 +11,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for TooManyManagementLinkRequests type.
  */
-public class TooManyManagementLinkRequests {
+public class TooManyManagementLinkRequests
+        extends BaseModel {
     private String error;
     private ZonedDateTime newLinkAvailableAt;
 
@@ -83,7 +85,7 @@ public void setNewLinkAvailableAt(ZonedDateTime newLinkAvailableAt) {
     @Override
     public String toString() {
         return "TooManyManagementLinkRequests [" + "error=" + error + ", newLinkAvailableAt="
-                + newLinkAvailableAt + "]";
+                + newLinkAvailableAt + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateAllocationExpirationDate.java b/src/main/java/com/maxio/advancedbilling/models/UpdateAllocationExpirationDate.java
index fbf5beb4..2b608989 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateAllocationExpirationDate.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateAllocationExpirationDate.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateAllocationExpirationDate type.
  */
-public class UpdateAllocationExpirationDate {
+public class UpdateAllocationExpirationDate
+        extends BaseModel {
     private AllocationExpirationDate allocation;
 
     /**
@@ -56,7 +58,8 @@ public void setAllocation(AllocationExpirationDate allocation) {
      */
     @Override
     public String toString() {
-        return "UpdateAllocationExpirationDate [" + "allocation=" + allocation + "]";
+        return "UpdateAllocationExpirationDate [" + "allocation=" + allocation
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateComponent.java b/src/main/java/com/maxio/advancedbilling/models/UpdateComponent.java
index 659f5bd5..2e6ff2b8 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateComponent.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for UpdateComponent type.
  */
-public class UpdateComponent {
+public class UpdateComponent
+        extends BaseModel {
     private String handle;
     private String name;
     private OptionalNullable<String> description;
@@ -390,7 +392,7 @@ public String toString() {
                 + description + ", accountingCode=" + accountingCode + ", taxable=" + taxable
                 + ", taxCode=" + taxCode + ", itemCategory=" + itemCategory
                 + ", displayOnHostedPage=" + displayOnHostedPage + ", upgradeCharge="
-                + upgradeCharge + "]";
+                + upgradeCharge + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateComponentPricePoint.java b/src/main/java/com/maxio/advancedbilling/models/UpdateComponentPricePoint.java
index 6666d62a..2902363c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateComponentPricePoint.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateComponentPricePoint.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for UpdateComponentPricePoint type.
  */
-public class UpdateComponentPricePoint {
+public class UpdateComponentPricePoint
+        extends BaseModel {
     private String name;
     private String handle;
     private PricingScheme pricingScheme;
@@ -243,7 +245,8 @@ public String toString() {
         return "UpdateComponentPricePoint [" + "name=" + name + ", handle=" + handle
                 + ", pricingScheme=" + pricingScheme + ", useSiteExchangeRate="
                 + useSiteExchangeRate + ", taxIncluded=" + taxIncluded + ", interval=" + interval
-                + ", intervalUnit=" + intervalUnit + ", prices=" + prices + "]";
+                + ", intervalUnit=" + intervalUnit + ", prices=" + prices
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateComponentPricePointRequest.java b/src/main/java/com/maxio/advancedbilling/models/UpdateComponentPricePointRequest.java
index 2d6e5421..0e6c11ab 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateComponentPricePointRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateComponentPricePointRequest.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateComponentPricePointRequest type.
  */
-public class UpdateComponentPricePointRequest {
+public class UpdateComponentPricePointRequest
+        extends BaseModel {
     private UpdateComponentPricePoint pricePoint;
 
     /**
@@ -56,7 +58,8 @@ public void setPricePoint(UpdateComponentPricePoint pricePoint) {
      */
     @Override
     public String toString() {
-        return "UpdateComponentPricePointRequest [" + "pricePoint=" + pricePoint + "]";
+        return "UpdateComponentPricePointRequest [" + "pricePoint=" + pricePoint
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateComponentRequest.java b/src/main/java/com/maxio/advancedbilling/models/UpdateComponentRequest.java
index 7da39c70..cb00bdc1 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateComponentRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateComponentRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateComponentRequest type.
  */
-public class UpdateComponentRequest {
+public class UpdateComponentRequest
+        extends BaseModel {
     private UpdateComponent component;
 
     /**
@@ -54,7 +56,8 @@ public void setComponent(UpdateComponent component) {
      */
     @Override
     public String toString() {
-        return "UpdateComponentRequest [" + "component=" + component + "]";
+        return "UpdateComponentRequest [" + "component=" + component + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateCouponCurrency.java b/src/main/java/com/maxio/advancedbilling/models/UpdateCouponCurrency.java
index 4f5d2d11..ccc3ea97 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateCouponCurrency.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateCouponCurrency.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateCouponCurrency type.
  */
-public class UpdateCouponCurrency {
+public class UpdateCouponCurrency
+        extends BaseModel {
     private String currency;
     private int price;
 
@@ -80,7 +82,8 @@ public void setPrice(int price) {
      */
     @Override
     public String toString() {
-        return "UpdateCouponCurrency [" + "currency=" + currency + ", price=" + price + "]";
+        return "UpdateCouponCurrency [" + "currency=" + currency + ", price=" + price
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateCurrencyPrice.java b/src/main/java/com/maxio/advancedbilling/models/UpdateCurrencyPrice.java
index a800e588..bcce5138 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateCurrencyPrice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateCurrencyPrice.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateCurrencyPrice type.
  */
-public class UpdateCurrencyPrice {
+public class UpdateCurrencyPrice
+        extends BaseModel {
     private int id;
     private int price;
 
@@ -80,7 +82,8 @@ public void setPrice(int price) {
      */
     @Override
     public String toString() {
-        return "UpdateCurrencyPrice [" + "id=" + id + ", price=" + price + "]";
+        return "UpdateCurrencyPrice [" + "id=" + id + ", price=" + price + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateCurrencyPricesRequest.java b/src/main/java/com/maxio/advancedbilling/models/UpdateCurrencyPricesRequest.java
index b56a5b9e..ae548171 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateCurrencyPricesRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateCurrencyPricesRequest.java
@@ -8,12 +8,14 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for UpdateCurrencyPricesRequest type.
  */
-public class UpdateCurrencyPricesRequest {
+public class UpdateCurrencyPricesRequest
+        extends BaseModel {
     private List<UpdateCurrencyPrice> currencyPrices;
 
     /**
@@ -55,7 +57,8 @@ public void setCurrencyPrices(List<UpdateCurrencyPrice> currencyPrices) {
      */
     @Override
     public String toString() {
-        return "UpdateCurrencyPricesRequest [" + "currencyPrices=" + currencyPrices + "]";
+        return "UpdateCurrencyPricesRequest [" + "currencyPrices=" + currencyPrices
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateCustomer.java b/src/main/java/com/maxio/advancedbilling/models/UpdateCustomer.java
index c157aeb5..229a803d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateCustomer.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateCustomer.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for UpdateCustomer type.
  */
-public class UpdateCustomer {
+public class UpdateCustomer
+        extends BaseModel {
     private String firstName;
     private String lastName;
     private String email;
@@ -519,7 +521,8 @@ public String toString() {
                 + ", city=" + city + ", state=" + state + ", zip=" + zip + ", country=" + country
                 + ", phone=" + phone + ", locale=" + locale + ", vatNumber=" + vatNumber
                 + ", taxExempt=" + taxExempt + ", taxExemptReason=" + taxExemptReason
-                + ", parentId=" + parentId + "]";
+                + ", parentId=" + parentId + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateCustomerRequest.java b/src/main/java/com/maxio/advancedbilling/models/UpdateCustomerRequest.java
index 976d309f..eb10ddbb 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateCustomerRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateCustomerRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateCustomerRequest type.
  */
-public class UpdateCustomerRequest {
+public class UpdateCustomerRequest
+        extends BaseModel {
     private UpdateCustomer customer;
 
     /**
@@ -54,7 +56,8 @@ public void setCustomer(UpdateCustomer customer) {
      */
     @Override
     public String toString() {
-        return "UpdateCustomerRequest [" + "customer=" + customer + "]";
+        return "UpdateCustomerRequest [" + "customer=" + customer + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateMetadata.java b/src/main/java/com/maxio/advancedbilling/models/UpdateMetadata.java
index b9bc9261..92d03484 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateMetadata.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateMetadata.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateMetadata type.
  */
-public class UpdateMetadata {
+public class UpdateMetadata
+        extends BaseModel {
     private String currentName;
     private String name;
     private String value;
@@ -103,7 +105,7 @@ public void setValue(String value) {
     @Override
     public String toString() {
         return "UpdateMetadata [" + "currentName=" + currentName + ", name=" + name + ", value="
-                + value + "]";
+                + value + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateMetadataRequest.java b/src/main/java/com/maxio/advancedbilling/models/UpdateMetadataRequest.java
index 4ebfdce3..aae9699f 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateMetadataRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateMetadataRequest.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateMetadataRequest type.
  */
-public class UpdateMetadataRequest {
+public class UpdateMetadataRequest
+        extends BaseModel {
     private UpdateMetadata metadata;
 
     /**
@@ -56,7 +58,8 @@ public void setMetadata(UpdateMetadata metadata) {
      */
     @Override
     public String toString() {
-        return "UpdateMetadataRequest [" + "metadata=" + metadata + "]";
+        return "UpdateMetadataRequest [" + "metadata=" + metadata + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateMetafield.java b/src/main/java/com/maxio/advancedbilling/models/UpdateMetafield.java
index 66bb8226..e2c41317 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateMetafield.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateMetafield.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for UpdateMetafield type.
  */
-public class UpdateMetafield {
+public class UpdateMetafield
+        extends BaseModel {
     private String currentName;
     private String name;
     private MetafieldScope scope;
@@ -164,7 +166,8 @@ public void setEnum(List<String> mEnum) {
     @Override
     public String toString() {
         return "UpdateMetafield [" + "currentName=" + currentName + ", name=" + name + ", scope="
-                + scope + ", inputType=" + inputType + ", mEnum=" + mEnum + "]";
+                + scope + ", inputType=" + inputType + ", mEnum=" + mEnum
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateMetafieldsRequest.java b/src/main/java/com/maxio/advancedbilling/models/UpdateMetafieldsRequest.java
index d9474fe1..c9bba284 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateMetafieldsRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateMetafieldsRequest.java
@@ -10,11 +10,13 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.maxio.advancedbilling.models.containers.UpdateMetafieldsRequestMetafields;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateMetafieldsRequest type.
  */
-public class UpdateMetafieldsRequest {
+public class UpdateMetafieldsRequest
+        extends BaseModel {
     private UpdateMetafieldsRequestMetafields metafields;
 
     /**
@@ -57,7 +59,8 @@ public void setMetafields(UpdateMetafieldsRequestMetafields metafields) {
      */
     @Override
     public String toString() {
-        return "UpdateMetafieldsRequest [" + "metafields=" + metafields + "]";
+        return "UpdateMetafieldsRequest [" + "metafields=" + metafields + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdatePaymentProfile.java b/src/main/java/com/maxio/advancedbilling/models/UpdatePaymentProfile.java
index 1f495ea0..1de5583a 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdatePaymentProfile.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdatePaymentProfile.java
@@ -10,12 +10,14 @@
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 
 /**
  * This is a model class for UpdatePaymentProfile type.
  */
-public class UpdatePaymentProfile {
+public class UpdatePaymentProfile
+        extends BaseModel {
     private String firstName;
     private String lastName;
     private String fullNumber;
@@ -447,7 +449,7 @@ public String toString() {
                 + currentVault + ", billingAddress=" + billingAddress + ", billingCity="
                 + billingCity + ", billingState=" + billingState + ", billingZip=" + billingZip
                 + ", billingCountry=" + billingCountry + ", billingAddress2=" + billingAddress2
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdatePaymentProfileRequest.java b/src/main/java/com/maxio/advancedbilling/models/UpdatePaymentProfileRequest.java
index 693e9321..1809658e 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdatePaymentProfileRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdatePaymentProfileRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdatePaymentProfileRequest type.
  */
-public class UpdatePaymentProfileRequest {
+public class UpdatePaymentProfileRequest
+        extends BaseModel {
     private UpdatePaymentProfile paymentProfile;
 
     /**
@@ -54,7 +56,8 @@ public void setPaymentProfile(UpdatePaymentProfile paymentProfile) {
      */
     @Override
     public String toString() {
-        return "UpdatePaymentProfileRequest [" + "paymentProfile=" + paymentProfile + "]";
+        return "UpdatePaymentProfileRequest [" + "paymentProfile=" + paymentProfile
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdatePrice.java b/src/main/java/com/maxio/advancedbilling/models/UpdatePrice.java
index ceefe6a6..e21ee0b9 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdatePrice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdatePrice.java
@@ -12,11 +12,13 @@
 import com.maxio.advancedbilling.models.containers.UpdatePriceEndingQuantity;
 import com.maxio.advancedbilling.models.containers.UpdatePriceStartingQuantity;
 import com.maxio.advancedbilling.models.containers.UpdatePriceUnitPrice;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdatePrice type.
  */
-public class UpdatePrice {
+public class UpdatePrice
+        extends BaseModel {
     private Integer id;
     private UpdatePriceEndingQuantity endingQuantity;
     private UpdatePriceUnitPrice unitPrice;
@@ -155,7 +157,7 @@ public void setStartingQuantity(UpdatePriceStartingQuantity startingQuantity) {
     public String toString() {
         return "UpdatePrice [" + "id=" + id + ", endingQuantity=" + endingQuantity + ", unitPrice="
                 + unitPrice + ", destroy=" + destroy + ", startingQuantity=" + startingQuantity
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateProductPricePoint.java b/src/main/java/com/maxio/advancedbilling/models/UpdateProductPricePoint.java
index 2048df8f..38e899ef 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateProductPricePoint.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateProductPricePoint.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateProductPricePoint type.
  */
-public class UpdateProductPricePoint {
+public class UpdateProductPricePoint
+        extends BaseModel {
     private String handle;
     private Long priceInCents;
 
@@ -80,7 +82,7 @@ public void setPriceInCents(Long priceInCents) {
     @Override
     public String toString() {
         return "UpdateProductPricePoint [" + "handle=" + handle + ", priceInCents=" + priceInCents
-                + "]";
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateProductPricePointRequest.java b/src/main/java/com/maxio/advancedbilling/models/UpdateProductPricePointRequest.java
index 041956e2..a59c4d94 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateProductPricePointRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateProductPricePointRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateProductPricePointRequest type.
  */
-public class UpdateProductPricePointRequest {
+public class UpdateProductPricePointRequest
+        extends BaseModel {
     private UpdateProductPricePoint pricePoint;
 
     /**
@@ -54,7 +56,8 @@ public void setPricePoint(UpdateProductPricePoint pricePoint) {
      */
     @Override
     public String toString() {
-        return "UpdateProductPricePointRequest [" + "pricePoint=" + pricePoint + "]";
+        return "UpdateProductPricePointRequest [" + "pricePoint=" + pricePoint
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateReasonCode.java b/src/main/java/com/maxio/advancedbilling/models/UpdateReasonCode.java
index 1de1ad92..4da5bc2c 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateReasonCode.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateReasonCode.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateReasonCode type.
  */
-public class UpdateReasonCode {
+public class UpdateReasonCode
+        extends BaseModel {
     private String code;
     private String description;
     private Integer position;
@@ -109,7 +111,8 @@ public void setPosition(Integer position) {
     @Override
     public String toString() {
         return "UpdateReasonCode [" + "code=" + code + ", description=" + description
-                + ", position=" + position + "]";
+                + ", position=" + position + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateReasonCodeRequest.java b/src/main/java/com/maxio/advancedbilling/models/UpdateReasonCodeRequest.java
index d0237007..d74802fd 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateReasonCodeRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateReasonCodeRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateReasonCodeRequest type.
  */
-public class UpdateReasonCodeRequest {
+public class UpdateReasonCodeRequest
+        extends BaseModel {
     private UpdateReasonCode reasonCode;
 
     /**
@@ -54,7 +56,8 @@ public void setReasonCode(UpdateReasonCode reasonCode) {
      */
     @Override
     public String toString() {
-        return "UpdateReasonCodeRequest [" + "reasonCode=" + reasonCode + "]";
+        return "UpdateReasonCodeRequest [" + "reasonCode=" + reasonCode + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateSegment.java b/src/main/java/com/maxio/advancedbilling/models/UpdateSegment.java
index 2cfa48c5..54e6a972 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateSegment.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateSegment.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for UpdateSegment type.
  */
-public class UpdateSegment {
+public class UpdateSegment
+        extends BaseModel {
     private PricingScheme pricingScheme;
     private List<CreateOrUpdateSegmentPrice> prices;
 
@@ -85,7 +87,8 @@ public void setPrices(List<CreateOrUpdateSegmentPrice> prices) {
      */
     @Override
     public String toString() {
-        return "UpdateSegment [" + "pricingScheme=" + pricingScheme + ", prices=" + prices + "]";
+        return "UpdateSegment [" + "pricingScheme=" + pricingScheme + ", prices=" + prices
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateSegmentRequest.java b/src/main/java/com/maxio/advancedbilling/models/UpdateSegmentRequest.java
index 4c28b1ee..e4a99bda 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateSegmentRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateSegmentRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateSegmentRequest type.
  */
-public class UpdateSegmentRequest {
+public class UpdateSegmentRequest
+        extends BaseModel {
     private UpdateSegment segment;
 
     /**
@@ -54,7 +56,8 @@ public void setSegment(UpdateSegment segment) {
      */
     @Override
     public String toString() {
-        return "UpdateSegmentRequest [" + "segment=" + segment + "]";
+        return "UpdateSegmentRequest [" + "segment=" + segment + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateSubscription.java b/src/main/java/com/maxio/advancedbilling/models/UpdateSubscription.java
index 2bf00641..a4779379 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateSubscription.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateSubscription.java
@@ -14,6 +14,7 @@
 import com.maxio.advancedbilling.DateTimeHelper;
 import com.maxio.advancedbilling.models.containers.UpdateSubscriptionNetTerms;
 import com.maxio.advancedbilling.models.containers.UpdateSubscriptionSnapDay;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 import java.util.List;
@@ -21,7 +22,8 @@
 /**
  * This is a model class for UpdateSubscription type.
  */
-public class UpdateSubscription {
+public class UpdateSubscription
+        extends BaseModel {
     private CreditCardAttributes creditCardAttributes;
     private String productHandle;
     private Integer productId;
@@ -562,7 +564,8 @@ public String toString() {
                 + ", reference=" + reference + ", customPrice=" + customPrice + ", components="
                 + components + ", dunningCommunicationDelayEnabled="
                 + dunningCommunicationDelayEnabled + ", dunningCommunicationDelayTimeZone="
-                + dunningCommunicationDelayTimeZone + "]";
+                + dunningCommunicationDelayTimeZone + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionComponent.java b/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionComponent.java
index f4a9ef19..5f7f33ad 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionComponent.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionComponent.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateSubscriptionComponent type.
  */
-public class UpdateSubscriptionComponent {
+public class UpdateSubscriptionComponent
+        extends BaseModel {
     private Integer componentId;
     private ComponentCustomPrice customPrice;
 
@@ -84,7 +86,7 @@ public void setCustomPrice(ComponentCustomPrice customPrice) {
     @Override
     public String toString() {
         return "UpdateSubscriptionComponent [" + "componentId=" + componentId + ", customPrice="
-                + customPrice + "]";
+                + customPrice + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionGroup.java b/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionGroup.java
index dc13210e..4f574c5d 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionGroup.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionGroup.java
@@ -9,12 +9,14 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 import java.util.List;
 
 /**
  * This is a model class for UpdateSubscriptionGroup type.
  */
-public class UpdateSubscriptionGroup {
+public class UpdateSubscriptionGroup
+        extends BaseModel {
     private List<Integer> memberIds;
 
     /**
@@ -57,7 +59,8 @@ public void setMemberIds(List<Integer> memberIds) {
      */
     @Override
     public String toString() {
-        return "UpdateSubscriptionGroup [" + "memberIds=" + memberIds + "]";
+        return "UpdateSubscriptionGroup [" + "memberIds=" + memberIds + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionGroupRequest.java b/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionGroupRequest.java
index 3e2b5ec8..42d6c895 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionGroupRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionGroupRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateSubscriptionGroupRequest type.
  */
-public class UpdateSubscriptionGroupRequest {
+public class UpdateSubscriptionGroupRequest
+        extends BaseModel {
     private UpdateSubscriptionGroup subscriptionGroup;
 
     /**
@@ -54,7 +56,8 @@ public void setSubscriptionGroup(UpdateSubscriptionGroup subscriptionGroup) {
      */
     @Override
     public String toString() {
-        return "UpdateSubscriptionGroupRequest [" + "subscriptionGroup=" + subscriptionGroup + "]";
+        return "UpdateSubscriptionGroupRequest [" + "subscriptionGroup=" + subscriptionGroup
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionNote.java b/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionNote.java
index b8b63994..23b820c9 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionNote.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionNote.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateSubscriptionNote type.
  */
-public class UpdateSubscriptionNote {
+public class UpdateSubscriptionNote
+        extends BaseModel {
     private String body;
     private boolean sticky;
 
@@ -76,7 +78,8 @@ public void setSticky(boolean sticky) {
      */
     @Override
     public String toString() {
-        return "UpdateSubscriptionNote [" + "body=" + body + ", sticky=" + sticky + "]";
+        return "UpdateSubscriptionNote [" + "body=" + body + ", sticky=" + sticky
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionNoteRequest.java b/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionNoteRequest.java
index 2ea20fdc..09986ead 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionNoteRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionNoteRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateSubscriptionNoteRequest type.
  */
-public class UpdateSubscriptionNoteRequest {
+public class UpdateSubscriptionNoteRequest
+        extends BaseModel {
     private UpdateSubscriptionNote note;
 
     /**
@@ -56,7 +58,8 @@ public void setNote(UpdateSubscriptionNote note) {
      */
     @Override
     public String toString() {
-        return "UpdateSubscriptionNoteRequest [" + "note=" + note + "]";
+        return "UpdateSubscriptionNoteRequest [" + "note=" + note + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionRequest.java b/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionRequest.java
index 62e25633..ccf5f07f 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpdateSubscriptionRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpdateSubscriptionRequest type.
  */
-public class UpdateSubscriptionRequest {
+public class UpdateSubscriptionRequest
+        extends BaseModel {
     private UpdateSubscription subscription;
 
     /**
@@ -54,7 +56,8 @@ public void setSubscription(UpdateSubscription subscription) {
      */
     @Override
     public String toString() {
-        return "UpdateSubscriptionRequest [" + "subscription=" + subscription + "]";
+        return "UpdateSubscriptionRequest [" + "subscription=" + subscription
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpsertPrepaidConfiguration.java b/src/main/java/com/maxio/advancedbilling/models/UpsertPrepaidConfiguration.java
index 788a25d3..c5a0da46 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpsertPrepaidConfiguration.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpsertPrepaidConfiguration.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpsertPrepaidConfiguration type.
  */
-public class UpsertPrepaidConfiguration {
+public class UpsertPrepaidConfiguration
+        extends BaseModel {
     private Long initialFundingAmountInCents;
     private Long replenishToAmountInCents;
     private Boolean autoReplenish;
@@ -128,7 +130,8 @@ public String toString() {
         return "UpsertPrepaidConfiguration [" + "initialFundingAmountInCents="
                 + initialFundingAmountInCents + ", replenishToAmountInCents="
                 + replenishToAmountInCents + ", autoReplenish=" + autoReplenish
-                + ", replenishThresholdAmountInCents=" + replenishThresholdAmountInCents + "]";
+                + ", replenishThresholdAmountInCents=" + replenishThresholdAmountInCents
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UpsertPrepaidConfigurationRequest.java b/src/main/java/com/maxio/advancedbilling/models/UpsertPrepaidConfigurationRequest.java
index 1df218a1..e55e24f4 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UpsertPrepaidConfigurationRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UpsertPrepaidConfigurationRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UpsertPrepaidConfigurationRequest type.
  */
-public class UpsertPrepaidConfigurationRequest {
+public class UpsertPrepaidConfigurationRequest
+        extends BaseModel {
     private UpsertPrepaidConfiguration prepaidConfiguration;
 
     /**
@@ -55,7 +57,8 @@ public void setPrepaidConfiguration(UpsertPrepaidConfiguration prepaidConfigurat
     @Override
     public String toString() {
         return "UpsertPrepaidConfigurationRequest [" + "prepaidConfiguration="
-                + prepaidConfiguration + "]";
+                + prepaidConfiguration + ", additionalProperties=" + getAdditionalProperties()
+                + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Usage.java b/src/main/java/com/maxio/advancedbilling/models/Usage.java
index 4fc59f0b..d2953088 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Usage.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Usage.java
@@ -13,12 +13,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
 import com.maxio.advancedbilling.models.containers.UsageQuantity;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for Usage type.
  */
-public class Usage {
+public class Usage
+        extends BaseModel {
     private Long id;
     private String memo;
     private ZonedDateTime createdAt;
@@ -250,7 +252,8 @@ public String toString() {
         return "Usage [" + "id=" + id + ", memo=" + memo + ", createdAt=" + createdAt
                 + ", pricePointId=" + pricePointId + ", quantity=" + quantity + ", overageQuantity="
                 + overageQuantity + ", componentId=" + componentId + ", componentHandle="
-                + componentHandle + ", subscriptionId=" + subscriptionId + "]";
+                + componentHandle + ", subscriptionId=" + subscriptionId + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/UsageResponse.java b/src/main/java/com/maxio/advancedbilling/models/UsageResponse.java
index cb47b286..d5b178e2 100644
--- a/src/main/java/com/maxio/advancedbilling/models/UsageResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/UsageResponse.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for UsageResponse type.
  */
-public class UsageResponse {
+public class UsageResponse
+        extends BaseModel {
     private Usage usage;
 
     /**
@@ -54,7 +56,8 @@ public void setUsage(Usage usage) {
      */
     @Override
     public String toString() {
-        return "UsageResponse [" + "usage=" + usage + "]";
+        return "UsageResponse [" + "usage=" + usage + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/VoidInvoice.java b/src/main/java/com/maxio/advancedbilling/models/VoidInvoice.java
index 2a731115..d3d6af4b 100644
--- a/src/main/java/com/maxio/advancedbilling/models/VoidInvoice.java
+++ b/src/main/java/com/maxio/advancedbilling/models/VoidInvoice.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for VoidInvoice type.
  */
-public class VoidInvoice {
+public class VoidInvoice
+        extends BaseModel {
     private String reason;
 
     /**
@@ -54,7 +56,8 @@ public void setReason(String reason) {
      */
     @Override
     public String toString() {
-        return "VoidInvoice [" + "reason=" + reason + "]";
+        return "VoidInvoice [" + "reason=" + reason + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/VoidInvoiceEventData.java b/src/main/java/com/maxio/advancedbilling/models/VoidInvoiceEventData.java
index 859bb1cd..66b41bbb 100644
--- a/src/main/java/com/maxio/advancedbilling/models/VoidInvoiceEventData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/VoidInvoiceEventData.java
@@ -14,12 +14,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
 import com.maxio.advancedbilling.models.containers.VoidInvoiceEventDataCreditNoteAttributes;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for VoidInvoiceEventData type.
  */
-public class VoidInvoiceEventData {
+public class VoidInvoiceEventData
+        extends BaseModel {
     private VoidInvoiceEventDataCreditNoteAttributes creditNoteAttributes;
     private String memo;
     private String appliedAmount;
@@ -187,7 +189,8 @@ public void setReason(String reason) {
     public String toString() {
         return "VoidInvoiceEventData [" + "creditNoteAttributes=" + creditNoteAttributes + ", memo="
                 + memo + ", appliedAmount=" + appliedAmount + ", transactionTime=" + transactionTime
-                + ", isAdvanceInvoice=" + isAdvanceInvoice + ", reason=" + reason + "]";
+                + ", isAdvanceInvoice=" + isAdvanceInvoice + ", reason=" + reason
+                + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/VoidInvoiceRequest.java b/src/main/java/com/maxio/advancedbilling/models/VoidInvoiceRequest.java
index 4a34e2ab..09bd11b6 100644
--- a/src/main/java/com/maxio/advancedbilling/models/VoidInvoiceRequest.java
+++ b/src/main/java/com/maxio/advancedbilling/models/VoidInvoiceRequest.java
@@ -8,11 +8,13 @@
 
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for VoidInvoiceRequest type.
  */
-public class VoidInvoiceRequest {
+public class VoidInvoiceRequest
+        extends BaseModel {
     private VoidInvoice mVoid;
 
     /**
@@ -54,7 +56,8 @@ public void setVoid(VoidInvoice mVoid) {
      */
     @Override
     public String toString() {
-        return "VoidInvoiceRequest [" + "mVoid=" + mVoid + "]";
+        return "VoidInvoiceRequest [" + "mVoid=" + mVoid + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/VoidRemainderEventData.java b/src/main/java/com/maxio/advancedbilling/models/VoidRemainderEventData.java
index 3970eecb..5c08c4d3 100644
--- a/src/main/java/com/maxio/advancedbilling/models/VoidRemainderEventData.java
+++ b/src/main/java/com/maxio/advancedbilling/models/VoidRemainderEventData.java
@@ -13,12 +13,14 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for VoidRemainderEventData type.
  */
-public class VoidRemainderEventData {
+public class VoidRemainderEventData
+        extends BaseModel {
     private CreditNote creditNoteAttributes;
     private String memo;
     private String appliedAmount;
@@ -137,7 +139,7 @@ public void setTransactionTime(ZonedDateTime transactionTime) {
     public String toString() {
         return "VoidRemainderEventData [" + "creditNoteAttributes=" + creditNoteAttributes
                 + ", memo=" + memo + ", appliedAmount=" + appliedAmount + ", transactionTime="
-                + transactionTime + "]";
+                + transactionTime + ", additionalProperties=" + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/Webhook.java b/src/main/java/com/maxio/advancedbilling/models/Webhook.java
index f5609321..1bd312ad 100644
--- a/src/main/java/com/maxio/advancedbilling/models/Webhook.java
+++ b/src/main/java/com/maxio/advancedbilling/models/Webhook.java
@@ -12,13 +12,15 @@
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import com.maxio.advancedbilling.DateTimeHelper;
+import io.apimatic.core.types.BaseModel;
 import io.apimatic.core.types.OptionalNullable;
 import java.time.ZonedDateTime;
 
 /**
  * This is a model class for Webhook type.
  */
-public class Webhook {
+public class Webhook
+        extends BaseModel {
     private String event;
     private Long id;
     private ZonedDateTime createdAt;
@@ -421,7 +423,8 @@ public String toString() {
                 + ", lastError=" + lastError + ", lastErrorAt=" + lastErrorAt + ", acceptedAt="
                 + acceptedAt + ", lastSentAt=" + lastSentAt + ", lastSentUrl=" + lastSentUrl
                 + ", successful=" + successful + ", body=" + body + ", signature=" + signature
-                + ", signatureHmacSha256=" + signatureHmacSha256 + "]";
+                + ", signatureHmacSha256=" + signatureHmacSha256 + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/src/main/java/com/maxio/advancedbilling/models/WebhookResponse.java b/src/main/java/com/maxio/advancedbilling/models/WebhookResponse.java
index 4c33545e..4d8fc081 100644
--- a/src/main/java/com/maxio/advancedbilling/models/WebhookResponse.java
+++ b/src/main/java/com/maxio/advancedbilling/models/WebhookResponse.java
@@ -9,11 +9,13 @@
 import com.fasterxml.jackson.annotation.JsonGetter;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonSetter;
+import io.apimatic.core.types.BaseModel;
 
 /**
  * This is a model class for WebhookResponse type.
  */
-public class WebhookResponse {
+public class WebhookResponse
+        extends BaseModel {
     private Webhook webhook;
 
     /**
@@ -56,7 +58,8 @@ public void setWebhook(Webhook webhook) {
      */
     @Override
     public String toString() {
-        return "WebhookResponse [" + "webhook=" + webhook + "]";
+        return "WebhookResponse [" + "webhook=" + webhook + ", additionalProperties="
+                + getAdditionalProperties() + "]";
     }
 
     /**
diff --git a/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerCreateTest.java b/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerCreateTest.java
index 65567533..3cddf616 100644
--- a/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerCreateTest.java
+++ b/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerCreateTest.java
@@ -37,6 +37,7 @@
 import com.maxio.advancedbilling.utils.TestSetup;
 import com.maxio.advancedbilling.utils.TestTeardown;
 import com.maxio.advancedbilling.utils.assertions.CommonAssertions;
+import io.apimatic.core.types.BaseModel;
 import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
@@ -46,6 +47,7 @@
 import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
 import java.time.temporal.ChronoUnit;
+import java.util.Collections;
 import java.util.List;
 
 import static com.maxio.advancedbilling.utils.TestFixtures.INVOICE_SELLER;
@@ -196,9 +198,17 @@ void shouldCreateInvoice() throws IOException, ApiException {
         assertThat(invoice.getPaidAmount()).isEqualTo("0.0");
         assertThat(invoice.getDueAmount()).isEqualTo("129.0");
 
-        assertThat(invoice.getLineItems())
+        List<InvoiceLineItem> lineItems = invoice.getLineItems();
+        assertThat(lineItems)
                 .hasSize(3)
-                .usingRecursiveFieldByFieldElementComparatorIgnoringFields("uid")
+                .extracting(BaseModel::getAdditionalProperties)
+                .containsExactlyInAnyOrder(
+                        Collections.singletonMap("billing_schedule_item_id", null),
+                        Collections.singletonMap("billing_schedule_item_id", null),
+                        Collections.singletonMap("billing_schedule_item_id", null)
+                );
+        assertThat(lineItems)
+                .usingRecursiveFieldByFieldElementComparatorIgnoringFields("uid", "additionalProperties")
                 .containsExactlyInAnyOrder(
                         new InvoiceLineItem.Builder()
                                 .title(product.getName())
diff --git a/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerIssueTest.java b/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerIssueTest.java
index 402e0ac7..e428eae1 100644
--- a/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerIssueTest.java
+++ b/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerIssueTest.java
@@ -34,6 +34,7 @@
 import com.maxio.advancedbilling.utils.TestSetup;
 import com.maxio.advancedbilling.utils.TestTeardown;
 import com.maxio.advancedbilling.utils.assertions.CommonAssertions;
+import io.apimatic.core.types.BaseModel;
 import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
@@ -43,7 +44,9 @@
 
 import java.io.IOException;
 import java.time.LocalDate;
+import java.util.Collections;
 import java.util.List;
+import java.util.Map;
 import java.util.stream.Stream;
 
 import static com.maxio.advancedbilling.utils.TestFixtures.INVOICE_SELLER;
@@ -130,6 +133,13 @@ void shouldIssuePendingInvoice() throws IOException, ApiException {
         );
 
         // then
+        assertThat(issuedInvoice.getAdditionalProperties())
+                .hasSize(2)
+                .containsExactlyInAnyOrderEntriesOf(Map.of(
+                                "debit_amount", "0.0",
+                                "debits", Collections.emptyList()
+                        )
+                );
         assertThat(issuedInvoice.getUid()).isEqualTo(pendingInvoice.getUid());
         assertThat(issuedInvoice.getSiteId()).isNotNull();
         assertThat(issuedInvoice.getCustomerId()).isEqualTo(customer.getId());
@@ -203,9 +213,13 @@ void shouldIssuePendingInvoice() throws IOException, ApiException {
         assertThat(issuedInvoice.getPaidAmount()).isEqualTo("0.0");
         assertThat(issuedInvoice.getDueAmount()).isEqualTo("5.4");
 
-        assertThat(issuedInvoice.getLineItems())
+        List<InvoiceLineItem> lineItems = issuedInvoice.getLineItems();
+        assertThat(lineItems)
                 .hasSize(1)
-                .usingRecursiveFieldByFieldElementComparatorIgnoringFields("uid", "description")
+                .extracting(BaseModel::getAdditionalProperties)
+                .containsExactly(Collections.singletonMap("billing_schedule_item_id", null));
+        assertThat(lineItems)
+                .usingRecursiveFieldByFieldElementComparatorIgnoringFields("uid", "description", "additionalProperties")
                 .containsExactly(
                         new InvoiceLineItem.Builder()
                                 .title("%s: 0.0 to 5.4 units".formatted(quantityBasedComponent.getName()))
diff --git a/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerListCreditNotesTest.java b/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerListCreditNotesTest.java
index 6b6d0189..2b7a3276 100644
--- a/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerListCreditNotesTest.java
+++ b/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerListCreditNotesTest.java
@@ -25,12 +25,14 @@
 import com.maxio.advancedbilling.utils.TestSetup;
 import com.maxio.advancedbilling.utils.TestTeardown;
 import com.maxio.advancedbilling.utils.assertions.CommonAssertions;
+import io.apimatic.core.types.BaseModel;
 import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
 
 import java.io.IOException;
 import java.time.LocalDate;
+import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 
@@ -226,10 +228,21 @@ void shouldReturnListOfCreditNotesWithAdditionalRefundsData() throws IOException
                 .getCreditNotes();
 
         // then
-        assertThat(creditNotes).hasSize(1);
-        assertThat(creditNotes.get(0).getRefunds())
+        assertThat(creditNotes)
                 .hasSize(1)
-                .usingRecursiveFieldByFieldElementComparatorIgnoringFields("uid", "transactionId", "paymentId", "transactionTime")
+                .extracting(BaseModel::getAdditionalProperties)
+                .containsExactly(Collections.emptyMap());
+        List<InvoiceRefund> refunds = creditNotes.get(0).getRefunds();
+        assertThat(refunds)
+                .hasSize(1)
+                .singleElement()
+                .extracting(BaseModel::getAdditionalProperties)
+                .satisfies(additionalProperties -> {
+                    assertThat(additionalProperties.get("uid")).isNotNull();
+                    assertThat(additionalProperties.get("transaction_time")).isNotNull();
+                });
+        assertThat(refunds)
+                .usingRecursiveFieldByFieldElementComparatorIgnoringFields("uid", "transactionId", "paymentId", "transactionTime", "additionalProperties")
                 .containsExactly(new InvoiceRefund.Builder()
                         .memo("Special refund")
                         .originalAmount("10.5")
diff --git a/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerListInvoiceEventsTest.java b/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerListInvoiceEventsTest.java
index 01367318..584cc941 100644
--- a/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerListInvoiceEventsTest.java
+++ b/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerListInvoiceEventsTest.java
@@ -375,12 +375,25 @@ void assertBasicEvent(InvoiceEvent event, InvoiceEventType expectedType, Invoice
         assertThat(event.getEventType()).isEqualTo(expectedType);
         assertThat(event.getTimestamp()).isNotNull();
         Invoice eventInvoice = event.getInvoice();
+        assertThat(eventInvoice.getAdditionalProperties()).satisfies(additionalProperties -> {
+            assertThat(additionalProperties.get("statement_id")).isNull();
+            assertThat(additionalProperties.get("legacy_invoice_number")).isNull();
+            assertThat(additionalProperties.get("backported_at")).isNull();
+            assertThat(additionalProperties.get("subscription_group_customer_ids")).isNull();
+            assertThat(additionalProperties.get("debit_amount")).isEqualTo("0.0");
+            assertThat(additionalProperties.get("debits")).usingRecursiveComparison().isEqualTo(List.of());
+            assertThat(additionalProperties.get("tax_exempt_amount")).isEqualTo("0.0");
+            assertThat(additionalProperties.get("status_changed_at")).isNotNull();
+            assertThat(additionalProperties.get("prepaid_usage_details")).isNull();
+            assertThat(additionalProperties.get("invoice_account_details")).isNull();
+            assertThat(additionalProperties.get("external_connected_data")).isNull();
+        });
         assertThat(eventInvoice)
                 .usingRecursiveComparison()
                 .ignoringFields("createdAt", "creditAmount", "credits", "discounts", "displaySettings",
                         "dueAmount", "id", "lineItems", "netTerms", "paidAmount", "paidDate", "payer", "payments",
                         "previousBalanceData", "publicUrl", "recipientEmails", "refundAmount", "refunds",
-                        "status", "transactionTime", "updatedAt")
+                        "status", "transactionTime", "updatedAt", "additionalProperties")
                 .isEqualTo(invoice);
         assertThat(eventInvoice.getCreatedAt()).isNotNull();
         assertThat(eventInvoice.getUpdatedAt()).isNotNull();
diff --git a/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerListInvoiceSegmentsTest.java b/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerListInvoiceSegmentsTest.java
index 73ed99ab..6df41d19 100644
--- a/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerListInvoiceSegmentsTest.java
+++ b/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerListInvoiceSegmentsTest.java
@@ -65,7 +65,7 @@ void shouldListInvoiceSegmentsForConsolidatedInvoice() throws IOException, ApiEx
         // given
         // Invoice segments returned on the index will only include totals, not detailed breakdowns for line_items,
         // discounts, taxes, credits, payments, or custom_fields
-        String[] IGNORED_FIELDS = {"credits", "customFields", "discounts", "lineItems", "payments", "refunds", "taxes", "updatedAt", "createdAt"};
+        String[] IGNORED_FIELDS = {"credits", "customFields", "discounts", "lineItems", "payments", "refunds", "taxes", "updatedAt", "createdAt", "additionalProperties"};
 
         Invoice subscriptionGroupInvoice = INVOICES_CONTROLLER
                 .listInvoices(new ListInvoicesInput.Builder()
@@ -93,7 +93,10 @@ void shouldListInvoiceSegmentsForConsolidatedInvoice() throws IOException, ApiEx
                 .collect(Collectors.toMap(Invoice::getSubscriptionId, Function.identity()));
 
         Invoice segment1 = subscriptionIdToInvoice.get(groupSignup.getSubscriptionIds().get(0));
+        assertThat(segment1.getAdditionalProperties()).containsExactly(Map.entry("debit_amount", "0.0"));
+
         Invoice segment2 = subscriptionIdToInvoice.get(groupSignup.getSubscriptionIds().get(1));
+        assertThat(segment2.getAdditionalProperties()).containsExactly(Map.entry("debit_amount", "0.0"));
 
         assertThat(segment1)
                 .usingRecursiveComparison()
diff --git a/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerReadCreditNoteTest.java b/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerReadCreditNoteTest.java
index 5204078f..865887f7 100644
--- a/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerReadCreditNoteTest.java
+++ b/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerReadCreditNoteTest.java
@@ -32,6 +32,7 @@
 import com.maxio.advancedbilling.utils.TestSetup;
 import com.maxio.advancedbilling.utils.TestTeardown;
 import com.maxio.advancedbilling.utils.assertions.CommonAssertions;
+import io.apimatic.core.types.BaseModel;
 import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
@@ -232,9 +233,17 @@ void shouldReadCreditNotes() throws IOException, ApiException, InterruptedExcept
                         .build()
                 );
 
-        assertThat(creditNote.getRefunds())
+        List<InvoiceRefund> refunds = creditNote.getRefunds();
+        assertThat(refunds)
                 .hasSize(1)
-                .usingRecursiveFieldByFieldElementComparatorIgnoringFields("uid", "transactionId", "paymentId", "transactionTime")
+                .extracting(BaseModel::getAdditionalProperties)
+                .singleElement()
+                .satisfies(additionalProperties -> {
+                    assertThat(additionalProperties.get("uid")).isNotNull();
+                    assertThat(additionalProperties.get("transaction_time")).isNotNull();
+                });
+        assertThat(refunds)
+                .usingRecursiveFieldByFieldElementComparatorIgnoringFields("uid", "transactionId", "paymentId", "transactionTime", "additionalProperties")
                 .containsExactly(new InvoiceRefund.Builder()
                         .memo("Special refund")
                         .originalAmount("10.5")
diff --git a/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerRefundInvoiceTest.java b/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerRefundInvoiceTest.java
index 1fc27849..547b0afa 100644
--- a/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerRefundInvoiceTest.java
+++ b/tests/src/test/java/com/maxio/advancedbilling/controllers/invoices/InvoicesControllerRefundInvoiceTest.java
@@ -33,7 +33,9 @@
 
 import java.io.IOException;
 import java.math.BigDecimal;
+import java.util.Collections;
 import java.util.List;
+import java.util.Map;
 
 import static com.maxio.advancedbilling.controllers.invoices.InvoicesControllerUtils.getPaidInvoiceForCustomer;
 import static com.maxio.advancedbilling.controllers.invoices.InvoicesControllerUtils.getPaidInvoiceForSubscription;
@@ -271,10 +273,16 @@ void shouldThrowExceptionIfInvoiceDoesNotExist() {
 
     private void assertRefundedInvoice(Invoice refundedInvoice, Invoice paidInvoice) {
         assertThat(refundedInvoice).isNotNull();
+        assertThat(refundedInvoice.getAdditionalProperties())
+                .hasSize(2)
+                .containsExactly(
+                        Map.entry("debit_amount", "0.0"),
+                        Map.entry("debits", Collections.emptyList())
+                );
         assertThat(refundedInvoice)
                 .usingRecursiveComparison()
                 .ignoringFields("createdAt", "updatedAt", "previousBalanceData.capturedAt",
-                        "payments.transactionTime", "creditAmount", "refundAmount", "credits", "refunds")
+                        "payments.transactionTime", "creditAmount", "refundAmount", "credits", "refunds", "additionalProperties")
                 .isEqualTo(paidInvoice);
     }
 
diff --git a/tests/src/test/java/com/maxio/advancedbilling/controllers/proformainvoices/ProformaInvoicesCreator.java b/tests/src/test/java/com/maxio/advancedbilling/controllers/proformainvoices/ProformaInvoicesCreator.java
index abe8ba0d..a9e6c33c 100644
--- a/tests/src/test/java/com/maxio/advancedbilling/controllers/proformainvoices/ProformaInvoicesCreator.java
+++ b/tests/src/test/java/com/maxio/advancedbilling/controllers/proformainvoices/ProformaInvoicesCreator.java
@@ -27,10 +27,12 @@
 import com.maxio.advancedbilling.models.containers.CreateUsageComponentId;
 import com.maxio.advancedbilling.models.containers.IssueServiceCreditAmount;
 import com.maxio.advancedbilling.utils.TestSetup;
+import io.apimatic.core.types.BaseModel;
 
 import java.io.IOException;
 import java.time.LocalDate;
 import java.time.format.DateTimeFormatter;
+import java.util.Collections;
 import java.util.List;
 
 import static com.maxio.advancedbilling.utils.TestFixtures.INVOICE_SELLER;
@@ -39,7 +41,7 @@
 
 class ProformaInvoicesCreator {
 
-    private static final TestSetup TEST_SETUP  = new TestSetup();
+    private static final TestSetup TEST_SETUP = new TestSetup();
     private static final AdvancedBillingClient CLIENT = TestClient.createClient();
 
     private final Product product;
@@ -104,11 +106,16 @@ private Subscription setupSubscription(Customer customer, Component quantityBase
     }
 
     void assertProformaInvoice(Customer customer,
-                                         ProformaInvoiceWithComponents invoiceWithData,
-                                         boolean assertPreservationDataNonEmpty) {
+                               ProformaInvoiceWithComponents invoiceWithData,
+                               boolean assertPreservationDataNonEmpty) {
         ProformaInvoice proformaInvoice = invoiceWithData.invoice();
+        assertThat(proformaInvoice.getAdditionalProperties()).isEmpty();
+
         Component quantityBasedComponent = invoiceWithData.quantityBasedComponent();
+        assertThat(quantityBasedComponent.getAdditionalProperties()).isEmpty();
+
         Component meteredComponent = invoiceWithData.meteredComponent();
+        assertThat(meteredComponent.getAdditionalProperties()).isEmpty();
 
         if (assertPreservationDataNonEmpty) {
             assertThat(proformaInvoice.getNumber()).isNotNull();
@@ -122,6 +129,7 @@ void assertProformaInvoice(Customer customer,
         assertThat(proformaInvoice.getUid()).isNotNull().isNotBlank();
 
         InvoiceAddress invoiceBillingAddress = proformaInvoice.getBillingAddress();
+        assertThat(invoiceBillingAddress.getAdditionalProperties()).isEmpty();
         assertAll(
                 () -> assertThat(invoiceBillingAddress).isNotNull(),
                 () -> assertThat(invoiceBillingAddress.getStreet()).isEqualTo("My Billing Address"),
@@ -133,6 +141,7 @@ void assertProformaInvoice(Customer customer,
         );
 
         InvoiceAddress invoiceShippingAddress = proformaInvoice.getShippingAddress();
+        assertThat(invoiceShippingAddress.getAdditionalProperties()).isEmpty();
         assertAll(
                 () -> assertThat(invoiceShippingAddress).isNotNull(),
                 () -> assertThat(invoiceShippingAddress.getStreet()).isEqualTo(customer.getAddress()),
@@ -158,6 +167,7 @@ void assertProformaInvoice(Customer customer,
         assertThat(proformaInvoice.getCustomFields()).isEmpty();
 
         InvoiceCustomer invoiceCustomer = proformaInvoice.getCustomer();
+        assertThat(invoiceCustomer.getAdditionalProperties()).isEmpty();
         assertAll(
                 () -> assertThat(invoiceCustomer).isNotNull(),
                 () -> assertThat(invoiceCustomer.getChargifyId()).isEqualTo(customer.getId()),
@@ -183,6 +193,7 @@ void assertProformaInvoice(Customer customer,
         assertThat(proformaInvoice.getRole()).isEqualTo(ProformaInvoiceRole.PROFORMA_ADHOC);
 
         InvoiceSeller invoiceSeller = proformaInvoice.getSeller();
+        assertThat(invoiceSeller.getAdditionalProperties()).isEmpty();
         assertThat(invoiceSeller)
                 .usingRecursiveComparison()
                 .isEqualTo(INVOICE_SELLER);
@@ -194,9 +205,18 @@ void assertProformaInvoice(Customer customer,
         assertThat(proformaInvoice.getTaxes()).isEmpty();
         assertThat(proformaInvoice.getTotalAmount()).isEqualTo("282.5");
 
-        assertThat(proformaInvoice.getLineItems())
+        List<InvoiceLineItem> lineItems = proformaInvoice.getLineItems();
+        assertThat(lineItems)
                 .hasSize(4)
-                .usingRecursiveFieldByFieldElementComparatorIgnoringFields("uid")
+                .extracting(BaseModel::getAdditionalProperties)
+                .containsExactlyInAnyOrder(
+                        Collections.singletonMap("billing_schedule_item_id", null),
+                        Collections.singletonMap("billing_schedule_item_id", null),
+                        Collections.singletonMap("billing_schedule_item_id", null),
+                        Collections.singletonMap("billing_schedule_item_id", null)
+                );
+        assertThat(lineItems)
+                .usingRecursiveFieldByFieldElementComparatorIgnoringFields("uid", "additionalProperties")
                 .containsExactlyInAnyOrder(
                         new InvoiceLineItem.Builder()
                                 .title(product.getName())
@@ -294,6 +314,6 @@ private String formatDescriptionDate(LocalDate localDate) {
     }
 
     record ProformaInvoiceWithComponents(ProformaInvoice invoice, Component quantityBasedComponent,
-                                                   Component meteredComponent) {
+                                         Component meteredComponent) {
     }
 }
diff --git a/tests/src/test/java/com/maxio/advancedbilling/controllers/subscriptions/SubscriptionsControllerPreviewTest.java b/tests/src/test/java/com/maxio/advancedbilling/controllers/subscriptions/SubscriptionsControllerPreviewTest.java
index 8d04ea88..d5df7f90 100644
--- a/tests/src/test/java/com/maxio/advancedbilling/controllers/subscriptions/SubscriptionsControllerPreviewTest.java
+++ b/tests/src/test/java/com/maxio/advancedbilling/controllers/subscriptions/SubscriptionsControllerPreviewTest.java
@@ -20,6 +20,7 @@
 import com.maxio.advancedbilling.models.containers.CreateSubscriptionComponentComponentId;
 import com.maxio.advancedbilling.utils.TestSetup;
 import com.maxio.advancedbilling.utils.TestTeardown;
+import io.apimatic.core.types.BaseModel;
 import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
@@ -31,6 +32,7 @@
 import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
 import java.time.temporal.ChronoUnit;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Stream;
@@ -123,9 +125,18 @@ void shouldReturnPreview() throws IOException, ApiException {
         assertThat(subscriptionPreview).isNotNull();
 
         BillingManifest currentBillingManifest = subscriptionPreview.getCurrentBillingManifest();
+        assertThat(currentBillingManifest.getAdditionalProperties()).isEmpty();
+        assertThat(currentBillingManifest.getLineItems())
+                .extracting(BaseModel::getAdditionalProperties)
+                .containsExactlyInAnyOrder(
+                        Collections.emptyMap(),
+                        Collections.emptyMap(),
+                        Map.of("coupon_code", percentageCoupon.getCode())
+                );
         assertThat(currentBillingManifest)
                 .usingRecursiveComparison()
-                .ignoringFields("startDate", "endDate")
+                .ignoringFields("startDate", "endDate", "additionalProperties", "lineItems.additionalProperties")
+                .ignoringFieldsOfTypes(Map.class)
                 .isEqualTo(new BillingManifest.Builder()
                         .lineItems(List.of(
                                 new BillingManifestItem.Builder()