public function renderBreadcrumbs(\Twig_Environment $twig, Breadcrumbs $breadcrumbs = null, $template = '@Breadcrumbs/breadcrumbs.html.twig')
 {
     if (null === $breadcrumbs) {
         $breadcrumbs = $this->breadcrumbsBuilder->createFromRequest();
     }
     return $twig->render($template, array('breadcrumbs' => $breadcrumbs));
 }
 /**
  * Create a Breadcrumbs Builder.
  *
  * @param string          $path
  * @param RouteCollection $collection
  *
  * @return BreadcrumbsBuilder
  */
 private function createBreadcrumbsBuilder($path, RouteCollection $collection)
 {
     /** @var \PHPUnit_Framework_MockObject_MockObject|Router $route */
     $route = $this->getMockBuilder('Symfony\\Bundle\\FrameworkBundle\\Routing\\Router')->disableOriginalConstructor()->getMock();
     $route->method('getRouteCollection')->willReturn($collection);
     $route->method('getContext')->willReturn(new RequestContext());
     $request = Request::create($path);
     if (class_exists('Symfony\\Component\\HttpFoundation\\RequestStack')) {
         $requestStack = $this->getMockBuilder('Symfony\\Component\\HttpFoundation\\RequestStack')->disableOriginalConstructor()->getMock();
         $requestStack->method('getCurrentRequest')->willReturn($request);
     } else {
         $requestStack = null;
     }
     $breadcrumbsBuilder = new BreadcrumbsBuilder($route, $requestStack);
     // BC with SF 2.3
     if (null === $requestStack) {
         $breadcrumbsBuilder->setRequest($request);
     }
     return $breadcrumbsBuilder;
 }