'Fetch a WorkspaceStatisticsInstance
:param unicode minutes: The minutes
:param datetime start_date: The start_date
:param datetime end_date: The end_date
:returns: Fetched WorkspaceStatisticsInstance
:rtype: twilio.rest.taskrouter.v1.workspace.workspace_statistics.WorkspaceStatisticsInstance'

def fetch(self, minutes=values.unset, start_date=values.unset, end_date=values.unset):

    params = values.of({'Minutes': minutes, 'StartDate': serialize.iso8601_datetime(start_date), 'EndDate': serialize.iso8601_datetime(end_date)})
    payload = self._version.fetch('GET', self._uri, params=params)
    return WorkspaceStatisticsInstance(self._version, payload, workspace_sid=self._solution['workspace_sid'])
