code: def escalation_date(self, escalation_date):
          
          if not self.can_update():
              self._tcex.handle_error(910, [self.type])
  
          escalation_date = self._utils.format_datetime(
              escalation_date, date_format='%Y-%m-%dT%H:%M:%SZ'
          )
          self._data['escalationDate'] = escalation_date
          request = {'escalationDate': escalation_date}
          return self.tc_requests.update(self.api_type, self.api_sub_type, self.unique_id, request)
docs: Sets the task escalation_date
          Args:
              escalation_date: Converted to %Y-%m-%dT%H:%M:%SZ date format