public function loadUserGroup( $id )
    {
        /** @var \eZ\Publish\API\Repository\Repository $repository */
        $repository = $this->getRepository();
        $userService = $repository->getUserService();

        $userGroup = $repository->sudo(
            function() use( $id, $userService )
            {
                return $userService->loadUserGroup( $id );
            }
        );

        return $userGroup;
    }