Neos\Fusion\TypoScriptObjects\Http\ResponseHeadImplementation::getStatusCode PHP Метод

    public function getStatusCode()
    {
        $statusCode = $this->tsValue('statusCode');
        if ($statusCode === null) {
            $statusCode = 200;
        }
        if (Response::getStatusMessageByCode($statusCode) === 'Unknown Status') {
            throw new \InvalidArgumentException('Unknown HTTP status code', 1412085703);
        }
        return (int) $statusCode;
    }