remoteHost := grid.Hosts[1]
	local := grid.Managers[0]

	// 1: Echo
	errFatal(local.RegisterSingleHandler(handlerTest, func(payload []byte) ([]byte, *RemoteErr) {
		t.Log("1: server payload: ", len(payload), "bytes.")
		return append([]byte{}, payload...), nil
	}))
	// 2: Return as error
	errFatal(local.RegisterSingleHandler(handlerTest2, func(payload []byte) ([]byte, *RemoteErr) {
		t.Log("2: server payload: ", len(payload), "bytes.")

	if h.newReq == nil {
		return errors.New("newReq nil in NewSingleHandler")
	}
	if h.newResp == nil {
		return errors.New("newResp nil in NewSingleHandler")
	}
	return m.RegisterSingleHandler(h.id, func(payload []byte) ([]byte, *RemoteErr) {
		req := h.NewRequest()
		_, err := req.UnmarshalMsg(payload)
		if err != nil {
			PutByteBuffer(payload)
			r := RemoteErr(err.Error())
			return nil, &r