public IEnumerator LoadIconImage(string url)
        {
            Texture2D texture = new Texture2D(4, 4, NativeAd.imageFormat(), false);
            WWW       www     = new WWW(url);

            yield return(www);

            www.LoadImageIntoTexture(texture);
            if (texture)
            {
                this.IconImage = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), new Vector2(0.5f, 0.5f));
            }
        }