code: def mark_for_update(self):
          '''
              Note that a change has been made so all Statuses need update
          '''
          self.pub_statuses.exclude(status=UNPUBLISHED).update(status=NEEDS_UPDATE)
          push_key.delay(selff mark_for_update(self):
          '''
              Note that a change has been made so all Statuses need update
          '''
          self.pub_statuses.exclude(status=UNPUBLISHED).update(status=NEEDS_UPDATE)
          push_key.delay(self)
docs: Note that a change has been made so all Statuses need update