@Override
protected void installListeners() {
super.installListeners();
// Improving performance on big menus.
this.substanceMenuPropertyListener = new MenuPropertyListener(
this.menuItem);
this.substanceMenuPropertyListener.install();
// fix for defect 109 - storing reference to rollover listener
this.substanceRolloverListener = new RolloverMenuItemListener(
this.menuItem, this.stateTransitionTracker);