code: def is_feeder(self, team_id=None):
          
          if team_id is None:
              return self._is_feeder
          team_id = uuid.UUID(str(team_id))
          if team_id not in self.teams_ids:
              return False
          return self.teams[team_id]['role'] == 'FEEDER'
docs: Ensure ther resource has the role FEEDER.