protected function getScriptSrc($onloadCallbackName)
    {
        $url = static::SCRIPT_URL;

        $queryArgs = [];
        \parse_str(\parse_url($url, PHP_URL_QUERY), $queryArgs);

        $queryArgs['onload'] = $onloadCallbackName;
        $queryArgs['render'] = 'explicit';

        $url = \sprintf('%s?%s', \strtok($url, '?'), \http_build_query($queryArgs));

        return $url;
    }