diff --git a/README.md b/README.md
index 8481267..562f5ce 100755
--- a/README.md
+++ b/README.md
@@ -66,6 +66,26 @@ class SomeClass
 }
 ```
 
+### Serialization groups
+
+```php
+class SomeClass
+{
+    #[SerializerContext(groups: ['group1'])]
+    public string $property1;
+
+    // Has implicit group 'default'
+    public string $property2;
+}
+
+    
+$serializer = new Serializer();
+$object = new SomeClass();
+$object->property1 = 'value1';
+$object->property2 = 'value2';
+$serializer->serialize($object, attributes: [SerializerInterface::ATTRIBUTE_GROUPS => ['group1']]); // {"property1":"value1"}
+```
+
 ### Custom date format
 
 Per property:
diff --git a/src/Attribute/SerializerContext.php b/src/Attribute/SerializerContext.php
index 9514781..66ecb21 100644
--- a/src/Attribute/SerializerContext.php
+++ b/src/Attribute/SerializerContext.php
@@ -8,12 +8,14 @@
 class SerializerContext
 {
     /**
-     * @param array<string, array<string, class-string>> $typeMap
+     * @param array<string, array<string, class-string>>|null $typeMap
+     * @param array<string> $groups
      * @param array<string, string|int|float|bool> $attributes
      */
     public function __construct(
         public ?string $name = null,
         public ?array $typeMap = null,
+        public array $groups = [],
         public array $attributes = [],
     ) {}
 }
diff --git a/src/Denormalizer.php b/src/Denormalizer.php
index f59f857..ad71615 100644
--- a/src/Denormalizer.php
+++ b/src/Denormalizer.php
@@ -11,7 +11,7 @@
 {
     /**
      * @param array<DenormalizerInterface> $denormalizers
-     * @param array<string, string|int|float|bool> $attributes
+     * @param array<string, scalar|string[]> $attributes
      */
     public function __construct(
         private array $denormalizers,
diff --git a/src/Metadata/DataType.php b/src/Metadata/DataType.php
index 821739c..3835fa2 100644
--- a/src/Metadata/DataType.php
+++ b/src/Metadata/DataType.php
@@ -14,7 +14,7 @@ class DataType
      * @param class-string|null $className
      * @param array<DataType> $listType
      * @param array<string, array<string, class-string>> $typeMap
-     * @param array<string, string|int|float|bool> $attributes
+     * @param array<string, scalar|string[]> $attributes
      */
     public function __construct(
         public BuiltInType $type,
diff --git a/src/Metadata/MetadataExtractor.php b/src/Metadata/MetadataExtractor.php
index 92580a9..eae81f3 100644
--- a/src/Metadata/MetadataExtractor.php
+++ b/src/Metadata/MetadataExtractor.php
@@ -108,6 +108,7 @@ private function extractPropertyMetadata(
                 $propertyName,
                 $serializerContext,
             ),
+            groups: [] === $serializerContext->groups ? ['default'] : $serializerContext->groups,
             attributes: $serializerContext->attributes,
             readAccess: $this->getPropertyReadAccess($reflectionProperty),
             writeAccess: $this->getPropertyWriteAccess($reflectionProperty),
diff --git a/src/Metadata/PropertyMetadata.php b/src/Metadata/PropertyMetadata.php
index b051efb..0759d45 100644
--- a/src/Metadata/PropertyMetadata.php
+++ b/src/Metadata/PropertyMetadata.php
@@ -11,12 +11,14 @@ class PropertyMetadata
 
     /**
      * @param DataType[] $types
+     * @param string[] $groups
      * @param array<string, string|int|float|bool> $attributes
      */
     public function __construct(
         public string $name,
         public string $serializedName,
         public array $types,
+        public array $groups,
         public array $attributes,
         public ReadAccess $readAccess,
         public WriteAccess $writeAccess,
diff --git a/src/Normalizer.php b/src/Normalizer.php
index 9a2b125..8cbc47e 100644
--- a/src/Normalizer.php
+++ b/src/Normalizer.php
@@ -10,7 +10,7 @@
 {
     /**
      * @param array<NormalizerInterface> $normalizers
-     * @param array<string, string|int|float|bool> $attributes
+     * @param array<string, scalar|string[]> $attributes
      */
     public function __construct(
         private array $normalizers,
@@ -19,7 +19,7 @@ public function __construct(
     ) {}
 
     /**
-     * @param array<string, string|int|float|bool> $attributes
+     * @param array<string, scalar|string[]> $attributes
      *
      * @throws SerializerException
      */
diff --git a/src/Normalizer/ObjectNormalizer.php b/src/Normalizer/ObjectNormalizer.php
index 248fa69..cdfbd25 100644
--- a/src/Normalizer/ObjectNormalizer.php
+++ b/src/Normalizer/ObjectNormalizer.php
@@ -17,12 +17,18 @@ public function normalize(mixed $data, Normalizer $normalizer, array $attributes
 
         $classMetadata = $normalizer->getMetadataExtractor()->extractClassMetadata($data::class);
         $normalizedData = [];
+        /** @var null|string[] $groups */
+        $groups = $attributes[SerializerInterface::ATTRIBUTE_GROUPS] ?? null;
 
         foreach ($classMetadata->properties as $name => $propertyMetadata) {
             if (ReadAccess::NONE === $propertyMetadata->readAccess) {
                 continue;
             }
 
+            if (null !== $groups && [] === array_intersect($groups, $propertyMetadata->groups)) {
+                continue;
+            }
+
             if (ReadAccess::DIRECT === $propertyMetadata->readAccess) {
                 /** @var scalar|null|object|array $value */
                 $value = $data->{$name};
diff --git a/src/NormalizerInterface.php b/src/NormalizerInterface.php
index a23cd1f..067511f 100644
--- a/src/NormalizerInterface.php
+++ b/src/NormalizerInterface.php
@@ -9,7 +9,7 @@ interface NormalizerInterface
     /**
      * @template T of object|array|scalar|null
      *
-     * @param array<string, string|int|float|bool> $attributes
+     * @param array<string, scalar|string[]> $attributes
      *
      * @return T|T[]
      * @throws SerializerException
diff --git a/src/Serializer.php b/src/Serializer.php
index 1196ca5..40ce8ef 100644
--- a/src/Serializer.php
+++ b/src/Serializer.php
@@ -30,7 +30,7 @@ class Serializer implements SerializerInterface
     /**
      * @param array<NormalizerInterface> $normalizers
      * @param array<DenormalizerInterface> $denormalizers
-     * @param array<string, string|int|float|bool> $attributes
+     * @param array<string, scalar|string[]> $attributes
      */
     public function __construct(
         array $normalizers = [],
@@ -75,9 +75,9 @@ public function __construct(
         );
     }
 
-    public function serialize(mixed $data): string
+    public function serialize(mixed $data, array $attributes = []): string
     {
-        $normalizedData = $this->normalize($data);
+        $normalizedData = $this->normalize($data, $attributes);
 
         try {
             return json_encode($normalizedData, JSON_THROW_ON_ERROR | JSON_PRESERVE_ZERO_FRACTION);
@@ -99,11 +99,13 @@ public function deserialize(string $data, ?string $type = null): mixed
     }
 
     /**
+     * @param array<string, scalar|string[]> $attributes
+     *
      * @throws SerializerException
      */
-    public function normalize(mixed $data): mixed
+    public function normalize(mixed $data, array $attributes): mixed
     {
-        return $this->normalizer->normalize($data, []);
+        return $this->normalizer->normalize($data, $attributes);
     }
 
     /**
diff --git a/src/SerializerInterface.php b/src/SerializerInterface.php
index 5252987..734535c 100644
--- a/src/SerializerInterface.php
+++ b/src/SerializerInterface.php
@@ -8,13 +8,16 @@ interface SerializerInterface
 {
     public const string ATTRIBUTE_DATETIME_FORMAT = 'datetime-format';
     public const string ATTRIBUTE_SKIP_NULL_VALUES = 'skip-null-values';
+    public const string ATTRIBUTE_GROUPS = 'groups';
 
     /**
      * Serializes data into a string.
      *
+     * @param array<string, scalar|string[]> $attributes
+     *
      * @throws SerializerException
      */
-    public function serialize(mixed $data): string;
+    public function serialize(mixed $data, array $attributes = []): string;
 
     /**
      * Deserializes data into the given type.
diff --git a/tests/Datasets/Group/SubLevel1.php b/tests/Datasets/Group/SubLevel1.php
new file mode 100644
index 0000000..6b0bdd1
--- /dev/null
+++ b/tests/Datasets/Group/SubLevel1.php
@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Vuryss\Serializer\Tests\Datasets\Group;
+
+use Vuryss\Serializer\Attribute\SerializerContext;
+
+class SubLevel1
+{
+    #[SerializerContext(groups: ['group1'])]
+    public SubLevel2 $nestedPropGroup1;
+
+    #[SerializerContext(groups: ['group2'])]
+    public SubLevel2 $nestedPropGroup2;
+
+    #[SerializerContext(groups: ['group1', 'group2'])]
+    public SubLevel2 $nestedPropGroup1And2;
+
+    public SubLevel2 $nestedPropNoGroup;
+
+    #[SerializerContext(groups: ['group1'])]
+    public string $propGroup1;
+
+    #[SerializerContext(groups: ['group2'])]
+    public string $propGroup2;
+
+    #[SerializerContext(groups: ['group1', 'group2'])]
+    public string $propGroup1And2;
+
+    public string $propNoGroup;
+}
diff --git a/tests/Datasets/Group/SubLevel2.php b/tests/Datasets/Group/SubLevel2.php
new file mode 100644
index 0000000..c3d0002
--- /dev/null
+++ b/tests/Datasets/Group/SubLevel2.php
@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Vuryss\Serializer\Tests\Datasets\Group;
+
+use Vuryss\Serializer\Attribute\SerializerContext;
+
+class SubLevel2
+{
+    #[SerializerContext(groups: ['group1'])]
+    public string $propGroup1;
+
+    #[SerializerContext(groups: ['group2'])]
+    public string $propGroup2;
+
+    #[SerializerContext(groups: ['group1', 'group2'])]
+    public string $propGroup1And2;
+
+    public string $propNoGroup;
+}
diff --git a/tests/Datasets/Group/TopLevelClass.php b/tests/Datasets/Group/TopLevelClass.php
new file mode 100644
index 0000000..867d710
--- /dev/null
+++ b/tests/Datasets/Group/TopLevelClass.php
@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Vuryss\Serializer\Tests\Datasets\Group;
+
+use Vuryss\Serializer\Attribute\SerializerContext;
+
+class TopLevelClass
+{
+    #[SerializerContext(groups: ['group1'])]
+    public SubLevel1 $nestedPropGroup1;
+
+    #[SerializerContext(groups: ['group2'])]
+    public SubLevel1 $nestedPropGroup2;
+
+    #[SerializerContext(groups: ['group1', 'group2'])]
+    public SubLevel1 $nestedPropGroup1And2;
+
+    public SubLevel1 $nestedPropNoGroup;
+
+    #[SerializerContext(groups: ['group1'])]
+    public string $propGroup1;
+
+    #[SerializerContext(groups: ['group2'])]
+    public string $propGroup2;
+
+    #[SerializerContext(groups: ['group1', 'group2'])]
+    public string $propGroup1And2;
+
+    public string $propNoGroup;
+}
diff --git a/tests/Unit/GroupsTest.php b/tests/Unit/GroupsTest.php
new file mode 100644
index 0000000..8db04ab
--- /dev/null
+++ b/tests/Unit/GroupsTest.php
@@ -0,0 +1,370 @@
+<?php
+
+/**
+ * @noinspection PhpUnhandledExceptionInspection
+ */
+
+declare(strict_types=1);
+
+use Vuryss\Serializer\Serializer;
+use Vuryss\Serializer\SerializerInterface;
+
+test('Serializing only values under specified groups', function ($groups, $expected) {
+    $subLevel2 = new \Vuryss\Serializer\Tests\Datasets\Group\SubLevel2();
+    $subLevel2->propGroup1 = 'subLevel2PropGroup1';
+    $subLevel2->propGroup2 = 'subLevel2PropGroup2';
+    $subLevel2->propGroup1And2 = 'subLevel2PropGroup1And2';
+    $subLevel2->propNoGroup = 'subLevel2PropNoGroup';
+
+    $subLevel1 = new \Vuryss\Serializer\Tests\Datasets\Group\SubLevel1();
+    $subLevel1->nestedPropGroup1 = clone $subLevel2;
+    $subLevel1->nestedPropGroup2 = clone $subLevel2;
+    $subLevel1->nestedPropGroup1And2 = clone $subLevel2;
+    $subLevel1->nestedPropNoGroup = clone $subLevel2;
+    $subLevel1->propGroup1 = 'subLevel1PropGroup1';
+    $subLevel1->propGroup2 = 'subLevel1PropGroup2';
+    $subLevel1->propGroup1And2 = 'subLevel1PropGroup1And2';
+    $subLevel1->propNoGroup = 'subLevel1PropNoGroup';
+
+    $data = new \Vuryss\Serializer\Tests\Datasets\Group\TopLevelClass();
+    $data->nestedPropGroup1 = clone $subLevel1;
+    $data->nestedPropGroup2 = clone $subLevel1;
+    $data->nestedPropGroup1And2 = clone $subLevel1;
+    $data->nestedPropNoGroup = clone $subLevel1;
+    $data->propGroup1 = 'topLevelPropGroup1';
+    $data->propGroup2 = 'topLevelPropGroup2';
+    $data->propGroup1And2 = 'topLevelPropGroup1And2';
+    $data->propNoGroup = 'topLevelPropNoGroup';
+
+    $serializer = new Serializer();
+    expect($serializer->serialize($data, attributes: [SerializerInterface::ATTRIBUTE_GROUPS => $groups]))
+        ->toBe(json_encode($expected));
+})->with([
+    'no groups' => [
+        null,
+        [
+            'nestedPropGroup1' => [
+                'nestedPropGroup1' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropGroup2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropGroup1And2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropNoGroup' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'propGroup1' => 'subLevel1PropGroup1',
+                'propGroup2' => 'subLevel1PropGroup2',
+                'propGroup1And2' => 'subLevel1PropGroup1And2',
+                'propNoGroup' => 'subLevel1PropNoGroup',
+            ],
+            'nestedPropGroup2' => [
+                'nestedPropGroup1' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropGroup2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropGroup1And2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropNoGroup' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'propGroup1' => 'subLevel1PropGroup1',
+                'propGroup2' => 'subLevel1PropGroup2',
+                'propGroup1And2' => 'subLevel1PropGroup1And2',
+                'propNoGroup' => 'subLevel1PropNoGroup',
+            ],
+            'nestedPropGroup1And2' => [
+                'nestedPropGroup1' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropGroup2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropGroup1And2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropNoGroup' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'propGroup1' => 'subLevel1PropGroup1',
+                'propGroup2' => 'subLevel1PropGroup2',
+                'propGroup1And2' => 'subLevel1PropGroup1And2',
+                'propNoGroup' => 'subLevel1PropNoGroup',
+            ],
+            'nestedPropNoGroup' => [
+                'nestedPropGroup1' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropGroup2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropGroup1And2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropNoGroup' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'propGroup1' => 'subLevel1PropGroup1',
+                'propGroup2' => 'subLevel1PropGroup2',
+                'propGroup1And2' => 'subLevel1PropGroup1And2',
+                'propNoGroup' => 'subLevel1PropNoGroup',
+            ],
+            'propGroup1' => 'topLevelPropGroup1',
+            'propGroup2' => 'topLevelPropGroup2',
+            'propGroup1And2' => 'topLevelPropGroup1And2',
+            'propNoGroup' => 'topLevelPropNoGroup',
+        ],
+    ],
+    'group1' => [
+        ['group1'],
+        [
+            'nestedPropGroup1' => [
+                'nestedPropGroup1' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'nestedPropGroup1And2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'propGroup1' => 'subLevel1PropGroup1',
+                'propGroup1And2' => 'subLevel1PropGroup1And2',
+            ],
+            'nestedPropGroup1And2' => [
+                'nestedPropGroup1' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'nestedPropGroup1And2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'propGroup1' => 'subLevel1PropGroup1',
+                'propGroup1And2' => 'subLevel1PropGroup1And2',
+            ],
+            'propGroup1' => 'topLevelPropGroup1',
+            'propGroup1And2' => 'topLevelPropGroup1And2',
+        ],
+    ],
+    'group2' => [
+        ['group2'],
+        [
+            'nestedPropGroup2' => [
+                'nestedPropGroup2' => [
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'nestedPropGroup1And2' => [
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'propGroup2' => 'subLevel1PropGroup2',
+                'propGroup1And2' => 'subLevel1PropGroup1And2',
+            ],
+            'nestedPropGroup1And2' => [
+                'nestedPropGroup2' => [
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'nestedPropGroup1And2' => [
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'propGroup2' => 'subLevel1PropGroup2',
+                'propGroup1And2' => 'subLevel1PropGroup1And2',
+            ],
+            'propGroup2' => 'topLevelPropGroup2',
+            'propGroup1And2' => 'topLevelPropGroup1And2',
+        ],
+    ],
+    'group1 and group2' => [
+        ['group1', 'group2'],
+        [
+            'nestedPropGroup1' => [
+                'nestedPropGroup1' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'nestedPropGroup2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'nestedPropGroup1And2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'propGroup1' => 'subLevel1PropGroup1',
+                'propGroup2' => 'subLevel1PropGroup2',
+                'propGroup1And2' => 'subLevel1PropGroup1And2',
+            ],
+            'nestedPropGroup2' => [
+                'nestedPropGroup1' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'nestedPropGroup2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'nestedPropGroup1And2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'propGroup1' => 'subLevel1PropGroup1',
+                'propGroup2' => 'subLevel1PropGroup2',
+                'propGroup1And2' => 'subLevel1PropGroup1And2',
+            ],
+            'nestedPropGroup1And2' => [
+                'nestedPropGroup1' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'nestedPropGroup2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'nestedPropGroup1And2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup2' => 'subLevel2PropGroup2',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                ],
+                'propGroup1' => 'subLevel1PropGroup1',
+                'propGroup2' => 'subLevel1PropGroup2',
+                'propGroup1And2' => 'subLevel1PropGroup1And2',
+            ],
+            'propGroup1' => 'topLevelPropGroup1',
+            'propGroup2' => 'topLevelPropGroup2',
+            'propGroup1And2' => 'topLevelPropGroup1And2',
+        ],
+    ],
+    'group1 and default combination' => [
+        ['group1', 'default'],
+        [
+            'nestedPropGroup1' => [
+                'nestedPropGroup1' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropGroup1And2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropNoGroup' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'propGroup1' => 'subLevel1PropGroup1',
+                'propGroup1And2' => 'subLevel1PropGroup1And2',
+                'propNoGroup' => 'subLevel1PropNoGroup',
+            ],
+            'nestedPropGroup1And2' => [
+                'nestedPropGroup1' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropGroup1And2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropNoGroup' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'propGroup1' => 'subLevel1PropGroup1',
+                'propGroup1And2' => 'subLevel1PropGroup1And2',
+                'propNoGroup' => 'subLevel1PropNoGroup',
+            ],
+            'nestedPropNoGroup' => [
+                'nestedPropGroup1' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropGroup1And2' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'nestedPropNoGroup' => [
+                    'propGroup1' => 'subLevel2PropGroup1',
+                    'propGroup1And2' => 'subLevel2PropGroup1And2',
+                    'propNoGroup' => 'subLevel2PropNoGroup',
+                ],
+                'propGroup1' => 'subLevel1PropGroup1',
+                'propGroup1And2' => 'subLevel1PropGroup1And2',
+                'propNoGroup' => 'subLevel1PropNoGroup',
+            ],
+            'propGroup1' => 'topLevelPropGroup1',
+            'propGroup1And2' => 'topLevelPropGroup1And2',
+            'propNoGroup' => 'topLevelPropNoGroup',
+        ],
+    ],
+]);