docs: @Nullable
    private Drawable buildBranch(
        @Nullable Drawable drawable, @Nullable ScalingUtils.ScaleType scaleType) {
      drawable = WrappingUtils.maybeApplyLeafRounding(drawable, mRoundingParams, mResources);
      drawable = WrappingUtils.maybeWrapWithScaleType(drawable, scaleType);
      return drawable;
    }