code: func (r *PEXReactor) IncrementMsgCountForPeer(addr string) {
  	var count uint16
  	countI := r.msgCountByPeer.Get(addr)
  	if countI != nil {
  		count = countI.(uint16)
  	}
  	count++
  	r.msgCountByPeer.Set(addr, count)
  }
docs: // Increment or initialize the msg count for the peer in the CMap