public static function add($request, $match)
    {
        $perm = Pluf_Shortcuts_GetObjectOr404('User_Role', $match['role_id']);
        $group = Pluf_Shortcuts_GetObjectOr404('User_Group', isset($match['group_id']) ? $match['group_id'] : $request->REQUEST['group_id']);
        $perm->setAssoc($group);
        return $group;
    }