Bug 315281 update copyrights for 3.6
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonViewerSorter.java
private static final int LEFT_UNDERSTANDS = 1;
	private static final int RIGHT_UNDERSTANDS = 2; 
	private static final int BOTH_UNDERSTAND = LEFT_UNDERSTANDS | RIGHT_UNDERSTANDS; 
	private NavigatorContentService contentService;
	private INavigatorSorterService sorterService;
	/**
	 * Create a sorter service attached to the given content service.
	 * 
	 * @param aContentService
	 *            The content service used by the viewer that will use this sorter service.
	 * @since 3.3
	 */
	public void setContentService(INavigatorContentService aContentService) {
		contentService = (NavigatorContentService) aContentService;
		sorterService = contentService.getSorterService();
	}
	/*
	 * (non-Javadoc)
	 *