code: public function updateGroup($id, $group_update_item)
      {
          list($response) = $this->updateGroupWithHttpInfo($id, $group_update_item);
          return $response;
      }
docs: Operation updateGroup
  
  
  
  @param string $id ID of group to retrieve (required)
  @param \ProcessMaker\PMIO\Model\GroupUpdateItem $group_update_item Group object to edit (required)
  @return \ProcessMaker\PMIO\Model\GroupItem
  @throws \ProcessMaker\PMIO\ApiException on non-2xx response