fElementMapper.rebuild(getActiveWorkingSets());
    /* package */ void setActiveWorkingSets(IWorkingSet[] workingSets) {    	fActiveWorkingSets= new ArrayList(Arrays.asList(workingSets));    	fOthersWorkingSetUpdater.updateElements();    	fireEvent(new PropertyChangeEvent(this, CHANGE_WORKING_SET_MODEL_CONTENT, null, null));    }