Eccube\Service\CartService::canAddProduct PHP Метод

    public function canAddProduct($productClassId)
    {
        $ProductClass = $this->entityManager->getRepository('\\Eccube\\Entity\\ProductClass')->find($productClassId);
        if (!$ProductClass) {
            return false;
        }
        $ProductType = $ProductClass->getProductType();
        return $this->ProductType == $ProductType;
    }