protected function setCssFileCDN($cssFileName)
    {
        $patternFound = null;
        if (strpos(pathinfo($cssFileName)['basename'], 'font-awesome-') !== false) {
            $patternFound = $this->setCssFileCDNforFontAwesome($cssFileName);
        }
        if (is_null($patternFound)) {
            $patternFound = [false, $this->sanitizeString($cssFileName)];
        }
        return $patternFound;
    }