code: public void setStartStopIndicatorVisible(final boolean START_STOP_INDICATOR_VISIBLE) {
          startStopIndicatorVisible = START_STOP_INDICATOR_VISIBLE;
          init(INNER_BOUNDS.width, INNER_BOUNDS.height);
          repaint(INNER_BOUNDS);
      }
docs: Defines the visibility of the start/stop indicators
  @param START_STOP_INDICATOR_VISIBLE