public static function parse(Tokenizer $tokenizer, StreamReader $streamReader)
    {
        $v = new self;
        if (\strspn($streamReader->getByte(), "\x00\x09\x0A\x0C\x0D\x20()<>[]{}/%") === 0) {
            $v->value = (string) $tokenizer->getNextToken();
            return $v;
        }

        $v->value = '';
        return $v;
    }