带参数的树枝扩展

我正试图看到一个小树枝扩展，但我挂在@安全。上下文注入，因为它返回给我一个错误，我在构造函数中添加参数?我是几个人在网上搜索，但问题是我找不到解决方案是我做错了什么?

目标是注入安全性。上下文来访问当前用户。

<?php
namespace Acme'AppBundle'Twig'Extension;
use Symfony'Component'Security'Core'SecurityContextInterface;
class reserveExtension extends 'Twig_Extension
{
    protected $context;
    public function __construct(SecurityContext $context)
    {
        $this->context = $context;
    }
    public function getFilters()
    {
        return array(new 'Twig_SimpleFilter('reserve_currentUser', array($this, 'reserveCurrentUser')));
    }
    function reserveCurrentUser($entity)
    {
        var_dump($this->context->getToken()->getUser());
    }
    public function getName()
    {
        return 'twig_extension_reserve';
    }
}

services:
reserveExtension:
    class: Acme'AppBundle'Twig'Extension'reserveExtension
    arguments: [@security.context]
    tags:
        - { name: twig.extension }

Catchable Fatal Error: Argument 1 passed to Acme'AppBundle'Twig'Extension'ReserveExtension::__construct() must be an instance of Acme'AppBundle'Twig'Extension'SecurityContext, instance of Symfony'Component'Security'Core'SecurityContext given, called in D:'wamp'www'Acme'app'cache'dev'appDevDebugProjectContainer.php on line 432 and defined