protected function getShopIds()
    {
        $shopIds = [];

        try {
            $shops = $this->container->getParameter('ongr_connections.shops');
        } catch (InvalidArgumentException $e) {
            $shops = [];
        }

        foreach ($shops as $shop) {
            $shopIds[] = $shop['shop_id'];
        }

        return $shopIds;
    }