code: public void fillRoundRect(double x, double y, double width, double height, double arcWidth, double arcHeight) {
  		this.gc.fillRoundRect(
  				doc2fxX(x), doc2fxY(y),
  				doc2fxSize(width), doc2fxSize(height),
  				doc2fxSize(arcWidth), doc2fxSize(arcHeight));
  	}
docs: Fills a rounded rectangle using the current fill paint.
  
  <p>This method will be affected by any of the
  global common or fill attributes as specified in the
  Rendering Attributes Table of {@link GraphicsContext}.
  
  @param x the X coordinate of the upper left bound of the oval.
  @param y the Y coordinate of the upper left bound of the oval.
  @param width the width at the center of the oval.
  @param height the height at the center of the oval.
  @param arcWidth the arc width of the rectangle corners.
  @param arcHeight the arc height of the rectangle corners.