code: def active(self, subject_id, entity_id):
          
  
          item = self._cache.find_one({"subject_id": subject_id,
                                       "entity_id": entity_id})
          try:
              return time_util.not_on_or_after(item["timestamp"])
          except ToOld:
              return False
docs: Returns the status of assertions from a specific entity_id.
  
          :param subject_id: The ID of the subject
          :param entity_id: The entity ID of the entity_id of the assertion
          :return: True or False depending on if the assertion is still
              valid or not.