static function run(HttpKernelInterface $app, Request $request = null)
{
$stack = $app->getStack();
$app = $stack->resolve($app);
$request = $request ?: Request::createFromGlobals();
$response = $app->handle($request);
$response->send();
if ($app instanceof TerminableInterface) {
$app->terminate($request, $response);
}
}