code: def attach_service(cls, service):
          
          if isinstance(service, HTTPService):
              cls._http_service = service
          elif isinstance(service, TCPService):
              cls._tcp_service = service
          else:
              cls._logger.error('Invalid argument attached as service')
          cls._set_bus(service)
docs: Allows you to attach one TCP and one HTTP service
  
          deprecated:: 2.1.73 use http and tcp specific methods
          :param service: A trellio TCP or HTTP service that needs to be hosted