GeneratedMessage.GeneratedExtension

java.lang.Object
- akka.protobuf.GeneratedMessage.GeneratedExtension<ContainingType,Type>

Enclosing class:

GeneratedMessage
```
public static final class GeneratedMessage.GeneratedExtension<ContainingType extends Message,Type>
extends java.lang.Object
```
Type used to represent generated extensions. The protocol compiler generates a static singleton instance of this class for each extension.
For example, imagine you have the .proto file:
```
 option java_class = "MyProto";

 message Foo {
   extensions 1000 to max;
 }

 extend Foo {
   optional int32 bar;
 }
 
```
Then, MyProto.Foo.bar has type GeneratedExtension<MyProto.Foo, Integer>.
In general, users should ignore the details of this type, and simply use these static singletons as parameters to the extension accessors defined in GeneratedMessage.ExtendableMessage and GeneratedMessage.ExtendableBuilder.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Descriptors.FieldDescriptor`	`getDescriptor()`
`Message`	`getMessageDefaultInstance()`	If the extension is an embedded message or group, returns the default instance of the message.
`void`	`internalInit(Descriptors.FieldDescriptor descriptor)`	For use by generated code only.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - internalInit
```
public void internalInit(Descriptors.FieldDescriptor descriptor)
```
    For use by generated code only.
  - getDescriptor
```
public Descriptors.FieldDescriptor getDescriptor()
```
  - getMessageDefaultInstance
```
public Message getMessageDefaultInstance()
```
    If the extension is an embedded message or group, returns the default instance of the message.