code: public void rect(double x, double y, double width, double height) {
  		this.gc.rect(
  				doc2fxX(x), doc2fxY(y),
  				doc2fxSize(width), doc2fxSize(height));
  	}
docs: Adds path elements to the current path to make a rectangle.
  The coordinates are transformed by the current transform as they are
  added to the path and unaffected by subsequent changes to the transform.
  The current path is a path attribute
  used for any of the path methods as specified in the
  Rendering Attributes Table of {@link GraphicsContext}
  and <b>is not affected</b> by the {@link #save()} and
  {@link #restore()} operations.
  
  @param x x position of the upper left corner of the rectangle.
  @param y y position of the upper left corner of the rectangle.
  @param width width of the rectangle.
  @param height height of the rectangle.