Eccube\Controller\ShoppingController::shoppingError PHP Method

    public function shoppingError(Application $app, Request $request)
    {
        $event = new EventArgs(array(), $request);
        $app['eccube.event.dispatcher']->dispatch(EccubeEvents::FRONT_SHOPPING_SHIPPING_ERROR_COMPLETE, $event);
        if ($event->getResponse() !== null) {
            return $event->getResponse();
        }
        return $app->render('Shopping/shopping_error.twig');
    }