private static function getExcludedUserAgents($website)
    {
        $excludedUserAgents = API::getInstance()->getExcludedUserAgentsGlobal();
        if (API::getInstance()->isSiteSpecificUserAgentExcludeEnabled()) {
            $excludedUserAgents .= ',' . $website['excluded_user_agents'];
        }
        return self::filterBlankFromCommaSepList($excludedUserAgents);
    }