未找到“Facebook \ HttpClients \ FacebookCurlHttpClient”类

Question

我用作曲家自动加载了Facebook的sdk课程。这是作曲家autoload_psr4.php：

$vendorDir = dirname(dirname(__FILE__));
$baseDir = dirname($vendorDir);

return array(
    'Facebook\\' => array($vendorDir . '/facebook/php-sdk-v4/src/Facebook'),
    'Bolt\\Extension\\radix\\facebook\\' => array($baseDir . '/'),
);

在我的代码中，我正在使用各种类：

use Facebook\HttpClients\FacebookHttpable;
use Facebook\HttpClients\FacebookCurl;
use Facebook\HttpClients\FacebookCurlHttpClient;
use Facebook\FacebookSession;
use Facebook\FacebookRedirectLoginHelper;
use Facebook\FacebookRequest;
use Facebook\FacebookResponse;
use Facebook\FacebookSDKException;
use Facebook\FacebookRequestException;
use Facebook\FacebookOtherException;
use Facebook\FacebookAuthorizationException;
use Facebook\GraphObject;
use Facebook\GraphSessionInfo;
use Facebook\GraphUser;

class Extension extends BaseExtension
{

    public function initialize() {

        FacebookSession::setDefaultApplication('zzzz','zzzzzzz');
        $session = new FacebookSession('zzzzz');

        $this->app->get("test", function () use ($session){
            $request = new FacebookRequest($session, 'GET', '/2342342342323432/events');
            $response = $request->execute();
            $graphObject = $response->getGraphObject();

            $response = $this->app->json($graphObject);
            return $response;
        });
    }

    public function getName()
    {
        return "facebook";
    }

}

但是我在击中那条路线时遇到了上述错误。该类肯定存在于自动加载的文件夹中，所以我不知道我在这里做错了什么。谁能摆脱光明？