code: def fetch(self, task_channel=values.unset):
          
          params = values.of({'TaskChannel': task_channel, })
  
          payload = self._version.fetch(
              'GET',
              self._uri,
              params=params,
          )
  
          return WorkersRealTimeStatisticsInstance(
              self._version,
              payload,
              workspace_sid=self._solution['workspace_sid'],
          )
docs: 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