code: private void setRange(final double RANGE) {
          if (null == range) {
              _range = RANGE;
              setAngleStep(getAngleRange() / RANGE);
          } else {
              range.set(RANGE);
          }
      }
docs: This is a private method that sets the range to the given value
  which is always (maxValue - minValue).
  
  @param RANGE