docs: def _get_sushy_manager(self, manager_id):
          """Get the sushy Manager for manager_id
  
          :param manager_id: The identity of the Manager resource
          :returns: the Sushy Manager instance
          :raises: IloError
          """
          manager_url = parse.urljoin(self._sushy.get_manager_collection_path(),
                                      manager_id)
          try:
              return self._sushy.get_manager(manager_url)
          except sushy.exceptions.SushyError as e:
              msg = (self._('The Redfish Manager "%(manager)s" was not found. '
                            'Error %(error)s') %
                     {'manager': manager_id, 'error': str(e)})
              LOG.debug(msg)
              raise exception.IloError(msg)