App\Http\Controllers\Laralum\Laralum::isAdmin PHP Method

    public static function isAdmin($user)
    {
        return $user->isAdmin();
    }

 public static function mustNotBeAdmin($user)
 {
     if (Laralum::isAdmin($user) and !Laralum::loggedInUser()->su) {
         abort(403, trans('laralum.error_no_rights_against_admin'));
     }
 }