code: public void setMinorTickMarkType(final TickMarkType TYPE) {
          if (null == minorTickMarkType) {
              _minorTickMarkType = null == TYPE ? TickMarkType.LINE : TYPE;
              fireUpdateEvent(REDRAW_EVENT);
          } else {
              minorTickMarkType.set(TYPE);
          }
      }
docs: Defines the shape that will be used to visualize the minor tickmark.
  Values are LINE, DOT, TRAPEZOID, BOX and PILL
  
  @param TYPE