function isXmlHttpRequest()
    {
        /** @var iHeader $header */
        if (! $this->getMessageObject()->headers()->has('X-Requested-With') )
            return false;

        $header = $this->getMessageObject()->headers()->get('X-Requested-With');
        return false !== $header && \Poirot\Http\Header\renderHeader($header) == 'XMLHttpRequest';
    }