code: func (nc *Conn) initNewResp() {
  	// _INBOX wildcard
  	nc.respSub = fmt.Sprintf("%s.*", NewInbox())
  	nc.respMap = make(map[string]chan *Msg)
  	nc.respRand = rand.New(rand.NewSource(time.Now().UnixNano()))
  }
docs: // Function to init new response structures.