docs: public boolean sendToMatching(Msg msg)
      {
          //  Is this end of a multipart message?
          boolean msgMore = msg.hasMore();
  
          //  Push the message to matching pipes.
          distribute(msg);
  
          //  If mutlipart message is fully sent, activate all the eligible pipes.
          if (!msgMore) {
              active = eligible;
          }
  
          more = msgMore;
  
          return true;
      }