Bug 138824 [CommonNavigator] Remove obsolete API
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/NavigatorSaveablesService.java
private NavigatorContentService contentService;
	private static List instances = new ArrayList();
	/**
	 * @param contentService
	 */
	public NavigatorSaveablesService(NavigatorContentService contentService) {
		this.contentService = contentService;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.navigator.INavigatorSaveablesService#createHelper(org.eclipse.ui.ISaveablesSource,
	 *      org.eclipse.jface.viewers.StructuredViewer,
	 *      org.eclipse.ui.ISaveablesLifecycleListener)
	 */
	public ISaveablesSourceHelper createHelper(ISaveablesSource source,
			StructuredViewer viewer, ISaveablesLifecycleListener listener) {
		SaveablesSourceHelper saveablesSourceHelper = new SaveablesSourceHelper();
		return saveablesSourceHelper;
	}
	private static void addInstance(NavigatorSaveablesService saveablesService) {
		synchronized (instances) {
			instances.add(saveablesService);
		}
	}
	private static void removeInstance(