private function getStatusIcon($status)
    {
        switch ($status) {
            case static::Status_Success:
                $result = json_decode('"\u2714"');
                break;
            case static::Status_Info:
            case static::Status_Warning:
                $result = '!';
                break;
            case static::Status_Error:
            default:
                $result = json_decode('"\u2716"');
                break;
        }
        return $result;
    }