GrpcService

```
@Documented
@Target(TYPE)
public @interface GrpcService
```
Annotates a class that implements a gRPC service.
Generates several types when annotating a class Foo:
- Interfaces FooComponent and FooComponent.Factory.
- Modules FooGrpcProxyModule and FooGrpcServiceModule.
To use these types to configure a server:
1. Create a subcomponent that implements FooComponent and installs FooGrpcServiceModule.
2. Install NettyServerModule or another ServerModule subclass and FooGrpcProxyModule into your @Singleton component.
3. Bind an implementation of FooComponent.Factory in your @Singleton component. The implementation will typically inject the @Singleton component and call subcomponent factory methods to instantiate the correct subcomponent.

- Required Element Summary
  
  Required Elements
  Modifier and Type Required Element Description
  
  java.lang.Class<?> grpcClass
  The class that gRPC generates from the proto service definition.

- Element Detail
  - grpcClass
```
java.lang.Class<?> grpcClass
```
    The class that gRPC generates from the proto service definition.