public function __async_upload()
    {
        /** @var array $result Asynchronous result array */
        $result = array('status' => false);
        /** @var \samsonphp\upload\Upload $upload  Pointer to uploader object */
        $upload = null;
        // If file was uploaded
        if (uploadFile($upload)) {
            $result['status'] = true;
            $result['tag'] = '<img src="' . $upload->fullPath() . '">';
        }
        // Return result
        return $result;
    }