/**
  * Strokes a rectangle defined by the supplied arguments.
  *
  * @param startX x coord of the top left corner
  * @param startY y coord of the top left corner
  * @param width width of the rectangle
  * @param height height of the rectangle
  */
 public void strokeRect(double startX, double startY, double width, double height) {
   impl.strokeRect(startX, startY, width, height);
 }