class BorderCorner {

  abstract protected RectF getOvalIfInnerCornerNotExist()@NonNull
  abstract protected RectF getOvalIfInnerCornerNotExist();

  abstract protected RectF getOvalIfInnerCornerNotExist()  BorderCorner(float cornerRadius, float preBorderWidth, float postBorderWidth,
      @NonNull RectF borderBox, float angleBisector);

}