code: public void setCustomGaugeType(CustomGaugeType CUSTOM_GAUGE_TYPE)
      {
          getModel().setCustomGaugeType(CUSTOM_GAUGE_TYPE);
          init(getInnerBounds().width, getInnerBounds().height);
          repaint(getInnerBounds());
      }
docs: Sets the custom radial type of the gauge.
  Set the gauge type to {@link GaugeType#CUSTOM CUSTOM}.
  @param CUSTOM_GAUGE_TYPE