code: private static Circle getCircleClip(final double radius, final double centerX, final double centerY) {
          final Circle clip = new Circle(radius);
          clip.setCenterX(centerX);
          clip.setCenterY(centerY);
          return clip;
      }
docs: Builds a clip-ready {@link Circle} with a specific radius and specific center position.
  
  @param radius  The radius of this circle.
  @param centerX The horizontal position for this circle's center
  @param centerY The vertical position for this circle's center
  
  @return A circle with the given radius and center position