public function quoteIdentifier($value)
    {
        $quote = false;
        switch ($this->getConfig()->get(Formatter::CFG_QUOTE_IDENTIFIER_STRATEGY)) {
            case Formatter::QUOTE_IDENTIFIER_AUTO:
                $quote = ReservedWords::isReserved($value);
                break;

            case Formatter::QUOTE_IDENTIFIER_ALWAYS:
                $quote = true;
                break;
        }

        return $quote ? '`'.$value.'`' : $value;
    }