Bug 299210 [CommonNavigator] Test improvements
tests/org.eclipse.ui.tests.navigator/src/org/eclipse/ui/tests/navigator/extension/TestContentProviderPipelined.java
/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.ui.navigator.IPipelinedTreeContentProvider#interceptRefresh
	 * (org.eclipse.ui.navigator.PipelinedViewerUpdate)
	 */
	public boolean interceptRefresh(
			PipelinedViewerUpdate aRefreshSynchronization) {
		return true;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.ui.navigator.IPipelinedTreeContentProvider#interceptRemove
	 * (org.eclipse.ui.navigator.PipelinedShapeModification)
	 */
	public PipelinedShapeModification interceptRemove(
			PipelinedShapeModification aRemoveModification) {
		return aRemoveModification;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.ui.navigator.IPipelinedTreeContentProvider#interceptUpdate
	 * (org.eclipse.ui.navigator.PipelinedViewerUpdate)
	 */
	public boolean interceptUpdate(PipelinedViewerUpdate anUpdateSynchronization) {