etadata: Metadata): akka.stream.scaladsl.Source[greeter.HelloReply, akka.NotUsed]
  
  def streamHellos(
    in: akka.stream.scaladsl.Source[greeter.HelloRequest, akka.NotUsed],
    metadata: Metadata): akka.stream.scaladsl.Source[greeter.HelloReply, akka.NotUsed]
  
  override def sayHello(in: greeter.HelloRequest): scala.concurrent.Future[greeter.HelloReply] = throw new GrpcServiceException(Status.UNIMPLEMENTED)
  
  override def itKeepsTalking(in: akka.stream.scaladsl.Source[greeter.HelloRequest, akka.No