protected function hasPermission($permission, Model $requester)
 {
     if ($permission == 'create') {
         return $requester->isLoggedIn();
     }
     if ($requester->id() == $this->uid) {
         return true;
     }
     return $requester->isAdmin();
 }
 protected function hasPermission($permission, Model $requester)
 {
     return $requester->isAdmin();
 }