code: @Override
      public void lazyHello(HelloRequest request, StreamObserver<HelloReply> responseObserver) {
          // You can use the event loop for scheduling a task.
          RequestContext.current().contextAwareEventLoop().schedule(() -> {
              responseObserver.onNext(buildReply(toMessage(request.getName())));
              responseObserver.onCompleted();
          }, 3, TimeUnit.SECONDS);
      }
docs: Sends a {@link HelloReply} 3 seconds after receiving a request.