private NakReceiverWindow createNakReceiverWindow(Address sender, long initial_seqno, long lowest_seqno) { NakReceiverWindow win=new NakReceiverWindow(local_addr, sender, this, initial_seqno, lowest_seqno, timer); win.setRetransmitTimeouts(retransmit_timeout); win.setDiscardDeliveredMessages(discard_delivered_msgs); win.setMaxXmitBufSize(this.max_xmit_buf_size); if(stats) win.setListener(this); return win; }