docs: def _get_sushy_system(self, system_id):
          """Get the sushy system for system_id
  
          :param system_id: The identity of the System resource
          :returns: the Sushy system instance
          :raises: IloError
          """
          system_url = parse.urljoin(self._sushy.get_system_collection_path(),
                                     system_id)
          try:
              return self._sushy.get_system(system_url)
          except sushy.exceptions.SushyError as e:
              msg = (self._('The Redfish System "%(system)s" was not found. '
                            'Error %(error)s') %
                     {'system': system_id, 'error': str(e)})
              LOG.debug(msg)
              raise exception.IloError(msg)