Bug 287103 [CommonNavigator] contentServiceLabelProvider doesn't properly implement overrides
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/NavigatorContentService.java
if (navigatorActivationService == null) {
			navigatorActivationService = new NavigatorActivationService(this);
		}
		return navigatorActivationService;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.ui.navigator.INavigatorContentService#getSaveableService()
	 */
	public INavigatorSaveablesService getSaveablesService() {
		synchronized (this) {
			if (navigatorSaveablesService == null) {
				navigatorSaveablesService = new NavigatorSaveablesService(this);
				assistant.addListener(navigatorSaveablesService);
			}
			return navigatorSaveablesService;
		}
	}
	/**
	 * Not API as of 3.3.
	 * 
	 * @return The extension state service for this content service.
	 * 
	 */
	public NavigatorExtensionStateService getExtensionStateService() {
		if (navigatorExtensionStateService == null) {
			navigatorExtensionStateService = new NavigatorExtensionStateService(
					this);