From 83b330c0da9d6b820cfabbfea344bccda4c79a9e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pawe=C5=82=20Zuzelski?= <pawelz@google.com>
Date: Wed, 28 Jun 2023 04:25:33 -0700
Subject: [PATCH] Annotate `Module` explicitly as `@FunctionalInterface`.

`Module` is implicitly a `@FunctionalInterface` already. That is very convenient, as it allows to express

```
methodThatTakesAModule(
    new AbstractModule(){
      @Override
      protected void configure() {
        bind(Foo.class).annotatedWith(Bar.class).toInstance(barredFoo);
      }
    }
);
```

as

```
methodThatTakesAModule(binder -> binder.bind(Foo.class).annotatedWith(Bar.class).toInstance(barredFoo));
```

PiperOrigin-RevId: 544017353
---
 core/src/com/google/inject/Module.java | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/src/com/google/inject/Module.java b/core/src/com/google/inject/Module.java
index 52cdd30689..ac9d7c68ae 100644
--- a/core/src/com/google/inject/Module.java
+++ b/core/src/com/google/inject/Module.java
@@ -28,6 +28,7 @@
  * all methods annotated with {@literal @}{@link Provides}. Use scope and binding annotations on
  * these methods to configure the bindings.
  */
+@FunctionalInterface
 public interface Module {
 
   /**