def task_postponed(self):
		""" Track (if required) postponing event and do the same job as :meth:`.WScheduleRecord.task_postponed`
		method do

		:return: None
		"""
		tracker = self.task().tracker_storage()
		if tracker is not None and self.track_wait() is True:
			details = self.task().event_details(WTrackerEvents.wait)
			tracker.register_wait(self.task(), event_details=details)
		WScheduleRecord.task_postponed(self)