docs: private ScaleTypeDrawable getScaleTypeDrawableAtIndex(int index) {
      DrawableParent parent = getParentDrawableAtIndex(index);
      if (parent instanceof ScaleTypeDrawable) {
        return (ScaleTypeDrawable) parent;
      } else {
        return WrappingUtils.wrapChildWithScaleType(parent, ScalingUtils.ScaleType.FIT_XY);
      }
    }