def fetch(self, task_channel=values.unset):
params = values.of({'<STR_LIT>': task_channel, })<EOL>payload = self._version.fetch(<EOL>'<STR_LIT:GET>',<EOL>self._uri,<EOL>params=params,<EOL>)<EOL>return WorkersRealTimeStatisticsInstance(<EOL>self._version,<EOL>payload,<EOL>workspace_sid=self._solution['<STR_LIT>'],<EOL>)<EOL>
Fetch a WorkersRealTimeStatisticsInstance

:param unicode task_channel: Filter cumulative statistics by TaskChannel.

:returns: Fetched WorkersRealTimeStatisticsInstance
:rtype: twilio.rest.taskrouter.v1.workspace.worker.workers_real_time_statistics.WorkersRealTimeStatisticsInstance