@Override
            public void onNext(HelloRequest value) {
                // Respond to every request received.
                responseObserver.onNext(buildReply(toMessage(value.getName())));
            }
Sends a {@link HelloReply} when each {@link HelloRequest} is received. The response will be completed
when the request is completed.
it/grpc/java/src/test/java/com/linecorp/armeria/grpc/java/TestServiceImpl.java