Symfony\Component\Routing\RouteCollection::getResources PHP Méthode

    public function getResources()
    {
        $resources = $this->resources;
        foreach ($this as $routes) {
            if ($routes instanceof RouteCollection) {
                $resources = array_merge($resources, $routes->getResources());
            }
        }

        return array_unique($resources);
    }

 /**
  * {@inheritdoc}
  */
 public function getRouteCollection()
 {
     static $i18nCollection;
     if ($i18nCollection instanceof RouteCollection === false) {
         if (null === $this->collection) {
             $this->collection = $this->container->get('routing.loader')->load($this->resource, $this->options['resource_type']);
         }
         $i18nCollection = new RouteCollection();
         foreach ($this->collection->getResources() as $resource) {
             $i18nCollection->addResource($resource);
         }
         foreach ($this->collection->all() as $name => $route) {
             //do not add i18n routing prefix
             if ($this->shouldExcludeRoute($name, $route)) {
                 $i18nCollection->add($name, $route);
                 continue;
             }
             //add i18n routing prefix
             foreach ($this->generateI18nPatterns($name, $route) as $pattern => $locales) {
                 foreach ($locales as $locale) {
                     $localeRoute = clone $route;
                     $localeRoute->setPath($pattern);
                     $localeRoute->setDefault('_locale', $locale);
                     $i18nCollection->add($locale . self::ROUTING_PREFIX . $name, $localeRoute);
                 }
             }
         }
     }
     return $i18nCollection;
 }