Bug 315281 update copyrights for 3.6
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/IPipelinedTreeContentProvider.java
* </p>
	 * 
	 * @param aRefreshSynchronization
	 *            The (current) refresh update to execute against the viewer.
	 * @return True if the viewer update was modified.
	 */
	boolean interceptRefresh(PipelinedViewerUpdate aRefreshSynchronization);
	/**
	 * Intercept calls to viewer <code>update()</code> methods.
	 * 
	 * <p>
	 * Clients may modify the given update to add or remove the elements to be
	 * updated. Clients may also add or remove properties for the given targets
	 * to optimize the refresh. Clients may return the same instance that was
	 * passed in for the next downstream extension.
	 * </p>
	 * 
	 * <p>
	 * <b>Clients should not call any of the add, remove, refresh, or update
	 * methods on the viewer from this method or any code invoked by the
	 * implementation of this method.</b>
	 * </p>
	 * 
	 * @param anUpdateSynchronization
	 *            The (current) update to execute against the viewer.
	 * @return True if the viewer update was modified.
	 */
	boolean interceptUpdate(PipelinedViewerUpdate anUpdateSynchronization);
}