code: @Override
      public void init(TCPWriteRequestContext x, H2MuxTCPWriteCallback c) {
          writeReqContext = x;
          muxCallback = c;
  
          // callback will need to know how to get back to this write queue.
          // This means one and only one H2WriteTree per H2InboundLink which has just one true TCP Channel facing write callback
          muxCallback.setH2WorkQ(this);
  
          tree = new Tree();
  
      }
docs: /*
  (non-Javadoc)
  
  @see com.ibm.ws.http.channel.h2internal.H2WorkQInterface#init(com.ibm.wsspi.tcpchannel.TCPWriteRequestContext, com.ibm.ws.http.channel.h2internal.H2MuxTCPWriteCallback)