code: public Shape createScrollButtonTogetherIncrease(int x, int y, int w, int h) {
          return createRectangle(x, y, w, h);
      }
docs: Return a path for a scroll bar increase button. This is used when the
  buttons are placed together at one end of the scroll bar.
  
  @param  x the X coordinate of the upper-left corner of the button
  @param  y the Y coordinate of the upper-left corner of the button
  @param  w the width of the button
  @param  h the height of the button
  
  @return a path representing the shape.