/**
     * 購入完了画面表示
     */
    public function complete(Application $app, Request $request)
    {
        // 受注IDを取得
        $orderId = $app['session']->get($this->sessionOrderKey);

        $event = new EventArgs(
            array(
                'orderId' => $orderId,
            ),
            $request
        );
        $app['eccube.event.dispatcher']->dispatch(EccubeEvents::FRONT_SHOPPING_COMPLETE_INITIALIZE, $event);

        if ($event->getResponse() !== null) {
            return $event->getResponse();
        }

        // 受注IDセッションを削除
        $app['session']->remove($this->sessionOrderKey);

        return $app->render('Shopping/complete.twig', array(
            'orderId' => $orderId,
        ));
    }