:meth:`.WThreadTask.start` implementation. Register (if required) start event by a tracker storage

		:return: None

def start(self):
		""" :meth:`.WThreadTask.start` implementation. Register (if required) start event by a tracker storage

		:return: None
		"""
		tracker = self.tracker_storage()
		if tracker is not None and self.track_start() is True:
			details = self.event_details(WTrackerEvents.start)
			tracker.register_start(self, event_details=details)
		WThreadTask.start(self)