Icicle\Http\Message\BasicRequest::withAddedHeader PHP Метод

    public function withAddedHeader(string $name, $value) : Message
    {
        $normalized = strtolower($name);
        if ('host' === $normalized && $this->hostFromUri) {
            $new = parent::withoutHeader('Host');
            $new->setHeader($name, $value);
            $new->hostFromUri = false;
        } else {
            $new = parent::withAddedHeader($name, $value);
            if ('cookie' === $normalized) {
                $new->setCookiesFromHeaders();
            }
        }
        return $new;
    }