public void PrintImageFromURL(string ImgURL)
        {
            if (websocket != null)
            {
                PrintImageFromURLRequestMessage msg     = new PrintImageFromURLRequestMessage();
                sdk.service.client.PrintImage   payload = new sdk.service.client.PrintImage();
                payload.Url = ImgURL;
                msg.payload = payload;

                websocket.Send(JsonUtils.serialize(msg));
            }
        }
        public void PrintImageFromURL(string ImgURL)
        {
            if (websocket != null)
            {
                PrintImageFromURLRequestMessage msg = new PrintImageFromURLRequestMessage();
                sdk.service.client.PrintImage payload = new sdk.service.client.PrintImage();
                payload.Url = ImgURL;
                msg.payload = payload;

                websocket.Send(JsonUtils.serialize(msg));
            }
        }