[2.x] Difficulté fil d'ariane

Bonsoir,

Je me suis lancée dans la création d'un fil d'ariane.
Pour cela, j'ai installé le KpnMenuBundle.

Mon menu principal fonctionne nickel, par contre pour le fil...
Voilà ce que j'ai dans ma class Builder:

Code:

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<?php
 
namespace Site\FrontBundle\Menu;
 
use Knp\Menu\FactoryInterface;
use Kpn\Menu\Iterator\CurrentItemFilterIterator;
use Kpn\Menu\Iterator\RecursiveItemIterator;
use Symfony\Component\DependencyInjection\ContainerAware;
 
/**
 * Builder of the main menu
 *
 */
class Builder extends ContainerAware {
 
    public function mainMenu(FactoryInterface $factory, array $options) {
 
        $menu = $factory->createItem('root');
        $menu->setChildrenAttribute('class', 'nav navbar-nav col-lg-5 col-md-5 col-sm-5');
        $menu->setChildrenAttribute('id', 'main-menu');
        $menu->setCurrent($this->container->get('request')->getRequestUri());
 
        $menu->addChild('Accueil', array(
            'route' => 'site_front_homepage',
            'attributes' => array('class' => 'nav-header')
        ));
        $menu->addChild('Tutoriels', array(
            'route' => 'site_front_tutorial',
            'attributes' => array('class' => 'nav-header')
        ));
        $menu->addChild('A propos', array(
            'route' => 'site_front_about',
            'attributes' => array('class' => 'nav-header')
        ));
        $menu->addChild('Contact', array(
            'route' => 'site_front_contact',
            'attributes' => array('class' => 'nav-header')
        ));
 
        return $menu;
    }
 
    /*
     * 
     */
    public function breadCrumb(FactoryInterface $factory, array $options)
    {
        $menu = $this->mainMenu($factory, $options);
 
        /* @var $matcher \Knp\Menu\Matcher\Matcher */
        $matcher = $this->container->get('knp_menu.matcher');
 
        $treeIterator = new RecursiveIteratorIterator(
                new RecursiveItemIterator(
                new ArrayIterator(array($menu))
                ), RecursiveIteratorIterator::SELF_FIRST
        );
 
        $iterator = new CurrentItemFilterIterator($treeIterator, $matcher);
 
        // Set Current as an empty Item in order to avoid exceptions on knp_menu_get
        $current = new MenuItem('', $factory);
 
        foreach ($iterator as $item) {
            $item->setCurrent(true);
            $current = $item;
            break;
        }
 
        return $current;
    }
 
}

J'ai glané ce code en lisant https://github.com/waldo2188/DemoMen...pMenuBundle.md

Sauf que j'ai une erreur "Attempted to load class "RecursiveIteratorIterator" from namespace "Site\FrontBundle\Menu".
Did you forget a "use" statement for another namespace?"

Si quelqu'un a déjà testé ça...
Merci ;-)

Difficulté fil d'ariane - KpnMenuBundle