m.singleResp = false
	msg := message{
		Op:         OpConnectMux,
		Handler:    h,
		Flags:      FlagEOF,
		Payload:    req,
		DeadlineMS: uint32(m.deadline.Milliseconds()),
	}
	msg.setZeroPayloadFlag()
	if m.subroute != nil {
		msg.Flags |= FlagSubroute
	}

	// Send...
	err := m.send(msg)
	if err != nil {
		out <- Response{Err: err}
		return
	}

	// Route directly to output.

			Seq:   m.Seq,
			Op:    OpResponse,
			Flags: FlagEOF,
		}
		if err != nil {
			m.Flags |= FlagPayloadIsErr
			m.Payload = []byte(*err)
		} else {
			m.Payload = b
			m.setZeroPayloadFlag()
		}
		gridLogIf(ctx, c.queueMsg(m, nil))
	}(m)
}

func (c *Connection) handlePong(ctx context.Context, m message) {
	var pong pongMsg
	_, err := pong.UnmarshalMsg(m.Payload)