wallabag/src/Wallabag/UserBundle/DependencyInjection/WallabagUserExtension.php

<?php

namespace Wallabag\UserBundle\DependencyInjection;

use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpKernel\DependencyInjection\Extension;

class WallabagUserExtension extends Extension
{
    public function load(array $configs, ContainerBuilder $container)
    {
        $configuration = new Configuration();
        $config = $this->processConfiguration($configuration, $configs);
    }

    public function getAlias()
    {
        return 'wallabag_user';
    }
}