code: private static void sendResponse(ChannelHandlerContext ctx, ByteBuf payload) {
          // Send a frame for the response status
          Http2Headers headers = new DefaultHttp2Headers().status(OK.codeAsText());
          ctx.write(new DefaultHttp2HeadersFrame(headers));
          ctx.write(new DefaultHttp2DataFrame(payload, true));
      }
docs: Sends a "Hello World" DATA frame to the client.