protected function _normalizeContent($path, $fileHead)
    {
        $css = file_get_contents($path);
        if (!$this->_configRead('debug')) {
            $css = $this->_compress($css, $fileHead);
        } else {
            list ($first, $second) = explode(PHP_EOL, $css, 2);
            if (preg_match('(\/* cacheid:)', $first)) {
                $css = $second;
            }

            $css = implode('', [$fileHead, $css]);
        }

        return $this->_replaceUrl($css);
    }