code: def update_control(self, control, process_id, wit_ref_name, group_id, control_id):
          
          route_values = {}
          if process_id is not None:
              route_values['processId'] = self._serialize.url('process_id', process_id, 'str')
          if wit_ref_name is not None:
              route_values['witRefName'] = self._serialize.url('wit_ref_name', wit_ref_name, 'str')
          if group_id is not None:
              route_values['groupId'] = self._serialize.url('group_id', group_id, 'str')
          if control_id is not None:
              route_values['controlId'] = self._serialize.url('control_id', control_id, 'str')
          content = self._serialize.body(control, 'Control')
          response = self._send(http_method='PATCH',
                                location_id='1f59b363-a2d0-4b7e-9bc6-eb9f5f3f0e58',
                                version='5.0-preview.1',
                                route_values=route_values,
                                content=content)
          return self._deserialize('Control', response)
docs: UpdateControl.
          [Preview API] Updates a control on the work item form.
          :param :class:`<Control> <azure.devops.v5_0.work_item_tracking_process.models.Control>` control: The updated control.
          :param str process_id: The ID of the process.
          :param str wit_ref_name: The reference name of the work item type.
          :param str group_id: The ID of the group.
          :param str control_id: The ID of the control.
          :rtype: :class:`<Control> <azure.devops.v5_0.work_item_tracking_process.models.Control>`