public function getAddressBookIdsToShow($website)
    {
        $bookIds = $this->getWebsiteConfig(
            \Dotdigitalgroup\Email\Helper\Config::XML_PATH_CONNECTOR_ADDRESSBOOK_PREF_SHOW_BOOKS,
            $website
        );

        if (empty($bookIds)) {
            return [];
        }

        $additionalFromConfig = explode(',', $bookIds);
        //unset the default option - for multi select
        if ($additionalFromConfig[0] == '0') {
            unset($additionalFromConfig[0]);
        }

        return $additionalFromConfig;
    }