public static function clearCache()
    {
        $tempDirectory = \OxidEsales\Eshop\Core\Registry::get(\OxidEsales\Eshop\Core\ConfigFile::class)->getVar("sCompileDir");
        $mask = $tempDirectory . "/" . self::CACHE_FILE_PREFIX . ".*.txt";
        $files = glob($mask);
        if (is_array($files)) {
            foreach ($files as $file) {
                if (is_file($file)) {
                    @unlink($file);
                }
            }
        }
    }