Symfony2 - Knp Menu Builder Class

Builder.php

<?php

namespace App\AppBundle\Menu;

use Knp\Menu\FactoryInterface;
use Symfony\Component\DependencyInjection\ContainerAware;

class Builder extends ContainerAware
{
    public function mainMenu(FactoryInterface $factory, array $options)
    {
        $menu = $factory->createItem('root');

        $menu->addChild('Home', array('route' => 'homepage'));

        return $menu;
    }
}