docs: def delete_group_dampening(self, group_id, dampening_id):
          """
          Delete an existing group dampening
  
          :param group_id: Group Trigger id to be retrieved
          :param dampening_id: id of the Dampening to be deleted
          """
          self._delete(self._service_url(['triggers', 'groups', group_id, 'dampenings', dampening_id]))