> compile

$ exists target/scala-2.12/pekko-grpc
$ exists target/scala-2.12/pekko-grpc/main/example/myapp/helloworld/grpc/HelloRequest.java
$ exists target/scala-2.12/pekko-grpc/main/example/myapp/helloworld/grpc/HelloReply.java
$ exists target/scala-2.12/pekko-grpc/main/example/myapp/helloworld/grpc/GreeterService.java
$ exists target/scala-2.12/pekko-grpc/main/example/myapp/helloworld/grpc/GreeterServiceClient.java

> doc
