code: public void setFrameType(final FrameType FRAME_TYPE) {
          getModel().setFrameType(FRAME_TYPE);
          init(getInnerBounds().width, getInnerBounds().height);
          repaint(getInnerBounds());
      }
docs: Defines the type of frame that will be used for the radial gauge.
  It could be round our square.
  @param FRAME_TYPE