QueryPath\CSS\QueryPathEventHandler::removeQuotes PHP Method

    private function removeQuotes($str)
    {
        $f = substr($str, 0, 1);
        $l = substr($str, -1);
        if ($f === $l && ($f == '"' || $f == "'")) {
            $str = substr($str, 1, -1);
        }
        return $str;
    }