breadCrumbLabels = new HashMap<String, HTML>();
}
private void registerHandlers(){
eventBus.addHandler(BreadCrumbEvent.TYPE,
new BreadCrumbEventHandler(){
public void onBreadCrumb(BreadCrumbEvent event){
if( event.getAction() == BreadCrumbEvent.Action.SET_CRUMBS ){
setBreadCrumbs(event.getCrumbNames());
} else if( event.getAction() == BreadCrumbEvent.Action.SET_ACTIVE ){
setActiveCrumb(event.getCrumb());