func (k *ktester) get(mr kex2.MessageRouter, low kex2.Seqno, poll time.Duration) ([][]byte, error) { return mr.Get(k.I, k.receiver, low, poll) }
func (k *ktester) post(mr kex2.MessageRouter, b []byte) error { k.seqno++ return mr.Post(k.I, k.sender, k.seqno, b) }