internal ImageAssetBitmapManager(string imagesFolder, IImageAssetDelegate assetDelegate, IDictionary <string, LottieImageAsset> imageAssets)
        {
            _imagesFolder = imagesFolder;
            if (!string.IsNullOrEmpty(imagesFolder) && _imagesFolder[_imagesFolder.Length - 1] != '/')
            {
                _imagesFolder += '/';
            }

            //if (!(callback is UIElement)) // TODO: Makes sense on UWP?
            //{
            //    Debug.WriteLine("LottieDrawable must be inside of a view for images to work.", L.TAG);
            //    this.imageAssets = new Dictionary<string, LottieImageAsset>();
            //    return;
            //}

            _imageAssets  = imageAssets;
            AssetDelegate = assetDelegate;
        }