fElementMapper.rebuild(getActiveWorkingSets());
	public WorkingSetModel() {		fLocalWorkingSetManager= PlatformUI.getWorkbench().createLocalWorkingSetManager();		addListenersToWorkingSetManagers();    	fActiveWorkingSets= new ArrayList(2);    			IWorkingSet history= fLocalWorkingSetManager.createWorkingSet("History", new IAdaptable[0]);    	history.setId("org.eclipse.jdt.internal.ui.HistoryWorkingSet"); //$NON-NLS-1$    	fLocalWorkingSetManager.addWorkingSet(history);    	fActiveWorkingSets.add(history);    	    	IWorkingSet others= fLocalWorkingSetManager.createWorkingSet("Other Projects", new IAdaptable[0]);    	others.setId("org.eclipse.jdt.internal.ui.OthersWorkingSet");    	fLocalWorkingSetManager.addWorkingSet(others);    	fActiveWorkingSets.add(others);    	fOthersWorkingSetUpdater.init(this);	}