code: def register_stop(self, task, event_details=None):
  		
  		if self.record_stop() is True:
  			record_type = WTrackerEvents.stop
  			record = WSimpleTrackerStorage.Record(record_type, task, event_details=event_details)
  			self.__store_record(record)
docs: :meth:`.WSimpleTrackerStorage.register_stop` method implementation