code: @Override
      public void destroy() {
          httpInboundChannel.stop(50);
  
          initialVC = null;
          frameReadProcessor = null;
          h2MuxReadCallback = null;
          h2MuxTCPConnectionContext = null;
          h2MuxTCPReadContext = null;
          h2MuxTCPWriteContext = null;
          localConnectionSettings = null;
          remoteConnectionSettings = null;
          readContextTable = null;
          writeContextTable = null;
  
          super.destroy();
      }
docs: A GOAWAY frame has been received; start shutting down this connection