PSR7Sessions\Storageless\Http\SessionMiddleware::getExpirationCookie PHP Метод

    private function getExpirationCookie() : SetCookie
    {
        $currentTimeProvider = $this->currentTimeProvider;
        $expirationDate = $currentTimeProvider();
        $expirationDate = $expirationDate->modify('-30 days');
        return $this->defaultCookie->withValue(null)->withExpires($expirationDate->getTimestamp());
    }