relay_messages.go
func (f lazyCallReq) Service() []byte {
	l := f.Payload[_serviceLenIndex]
	return f.Payload[_serviceNameIndex : _serviceNameIndex+l]
}
func (f lazyCallReq) Service() []byte {
	l := f.Payload[_serviceLenIndex]
	return f.Payload[_serviceNameIndex : _serviceNameIndex+l]
}
// Service returns the name of the destination service for this callReq.