private static function multilineQuote($string)
    {
        $lines = \explode("\n", $string);
        $last = \count($lines) - 1;

        foreach ($lines as $k => $line) {
            if ($k === $last) {
                $lines[$k] = self::convertString($line);
            } else {
                $lines[$k] = self::convertString($line . "\n");
            }
        }

        return $lines;
    }