def fetch(self, end_date=values.unset, minutes=values.unset,<EOL>start_date=values.unset, task_channel=values.unset,<EOL>split_by_wait_time=values.unset):
return self._proxy.fetch(<EOL>end_date=end_date,<EOL>minutes=minutes,<EOL>start_date=start_date,<EOL>task_channel=task_channel,<EOL>split_by_wait_time=split_by_wait_time,<EOL>)<EOL>
Fetch a WorkflowCumulativeStatisticsInstance

:param datetime end_date: Filter cumulative statistics by an end date.
:param unicode minutes: Filter cumulative statistics by up to 'x' minutes in the past.
:param datetime start_date: Filter cumulative statistics by a start date.
:param unicode task_channel: Filter real-time and cumulative statistics by TaskChannel.
:param unicode split_by_wait_time: A comma separated values for viewing splits of tasks canceled and accepted above the given threshold in seconds.

:returns: Fetched WorkflowCumulativeStatisticsInstance
:rtype: twilio.rest.taskrouter.v1.workspace.workflow.workflow_cumulative_statistics.WorkflowCumulativeStatisticsInstance