}
	}()
	// handlerErr is guarded by 'send' channel.
	handlerErr = handler.Handle(ctx, msg.Payload, handlerIn, send)
	return handlerErr
}

// checkRemoteAlive will check if the remote is alive.
func (m *muxServer) checkRemoteAlive() {
	t := time.NewTicker(lastPingThreshold / 4)
	defer t.Stop()
	for {
		select {
		case <-m.ctx.Done():
			return
		case <-t.C: