如何从FacebookRequest获取财产

Question

当我这样做时：

$user_profile = (new FacebookRequest($session, 'GET', '/me'))->execute()->getGraphObject(GraphUser::className());

我可以获得这样的财产

 $result['firstName'] = $user_profile->getProperty("first_name");
      $result['lastName'] = $user_profile->getProperty("last_name");

但是当我想从我获得财产时我不能：

$likes = (new FacebookRequest($session, 'GET', '/me?fields=likes.limit(1000)'))->execute()->getGraphObject();

请帮助 感谢