Bug 299331 [CommonNavigator] Compile errors in new CNF tests
tests/org.eclipse.ui.tests.navigator/src/org/eclipse/ui/tests/navigator/extension/TestPipelineProvider.java
return super.interceptAdd(anAddModification);
	}
	/* (non-Javadoc)
	 * @see org.eclipse.ui.navigator.IPipelinedTreeContentProvider#interceptRefresh(org.eclipse.ui.navigator.PipelinedViewerUpdate)
	 */
	public boolean interceptRefresh(PipelinedViewerUpdate update) {
		Set targets = update.getRefreshTargets();
		for (Iterator it = targets.iterator(); it.hasNext(); ) {
			_track(UPDATES, it.next(), _id);
		}
		return super.interceptRefresh(update);
	}
	/* (non-Javadoc)
	 * @see org.eclipse.ui.navigator.IPipelinedTreeContentProvider#interceptRemove(org.eclipse.ui.navigator.PipelinedShapeModification)
	 */
	public PipelinedShapeModification interceptRemove(PipelinedShapeModification aRemoveModification) {
		Set children = aRemoveModification.getChildren();
		for (Iterator it = children.iterator(); it.hasNext(); ) {
			_track(REMOVES, it.next(), _id);
		}
		return super.interceptRemove(aRemoveModification);
	}
	/* (non-Javadoc)
	 * @see org.eclipse.ui.navigator.IPipelinedTreeContentProvider#interceptUpdate(org.eclipse.ui.navigator.PipelinedViewerUpdate)
	 */
	public boolean interceptUpdate(PipelinedViewerUpdate update) {
		Set targets = update.getRefreshTargets();
		for (Iterator it = targets.iterator(); it.hasNext(); ) {
			_track(UPDATES, it.next(), _id);
		}