Elgg\Http\OkResponse::setStatusCode PHP Метод

    public function setStatusCode($status_code = ELGG_HTTP_OK)
    {
        if (isset($status_code) && (!is_numeric($status_code) || $status_code < 100 || $status_code > 599)) {
            throw new InvalidArgumentException(__METHOD__ . ' expects a valid HTTP status code');
        }
        $this->status_code = (int) $status_code;
        return $this;
    }