docs: public void setMinorTickMarkLengthFactor(final double FACTOR) {
          if (null == minorTickMarkLengthFactor) {
              _minorTickMarkLengthFactor = Helper.clamp(0.0, 1.0, FACTOR);
              fireUpdateEvent(REDRAW_EVENT);
          } else {
              minorTickMarkLengthFactor.set(FACTOR);
          }
      }