Opis\Closure\SecureClosure::serialize PHP 메소드

    public function serialize()
    {
        if (static::$securityProvider === null) {
            throw new RuntimeException('You must set a security provider in order to use this class');
        }
        $data = parent::serialize();
        $data =& static::$securityProvider->sign($data);
        return serialize($data);
    }