if (log.isDebugEnabled()) log.debug("PB========= HeartbeatPiggybacking_Send_Delegate initialized");
        public HeartbeatPiggybacking_Send_Delegate (Router router)        {          super (router);          if (log.isDebugEnabled())               log.debug("PB========= HeartbeatPiggybacking_Send_Delegate initialized");          HeartbeatQueueThread hbqt = new HeartbeatQueueThread(this);          (new Thread (hbqt, "HeartbeatQueueThread")).start();        }