protected static void OnTransformationsChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            MvxCachedImageView mvxCachedImageView = (MvxCachedImageView)d;

            if (!mvxCachedImageView.IsInDesignMode && mvxCachedImageView._lastImageSource != null)
            {
                mvxCachedImageView.UpdateImageLoadingTask();
            }
        }
        protected static void OnImageChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            MvxCachedImageView mvxCachedImageView = (MvxCachedImageView)d;

            if (!mvxCachedImageView.IsInDesignMode)
            {
                mvxCachedImageView.UpdateImageLoadingTask();
            }
        }