code: public void setCustomGaugeType(CustomGaugeType CUSTOM_GAUGE_TYPE)
      {
          this.customGaugeType = CUSTOM_GAUGE_TYPE;
          gaugeType = GaugeType.CUSTOM;
          calcAngleStep();
          fireStateChanged();
      }
docs: Sets the custom radial type of the gauge.
  Set the gauge type to {@link GaugeType#CUSTOM CUSTOM}.
  @param CUSTOM_GAUGE_TYPE