public function permissionsAssign(Request $request, AclManager $acl)
 {
     if ($request->get('type') === 'role') {
         $acl->assignPermitionsToRole($request->get('model'), $request->get('perms'));
     } else {
         $acl->assignPermitionsToUser($request->get('model'), $request->get('perms'));
     }
     flash()->success(trans('LaravelAdmin::laravel-admin.permissionsAttachSuccess'));
     return Redirect::back();
 }