code: public EpollSocketChannelConfig setTcpQuickAck(boolean quickAck) {
          try {
              ((EpollSocketChannel) channel).socket.setTcpQuickAck(quickAck);
              return this;
          } catch (IOException e) {
              throw new ChannelException(e);
          }
      }
docs: Set the {@code TCP_QUICKACK} option on the socket. See <a href="http://linux.die.net/man/7/tcp">TCP_QUICKACK</a>
  for more details.