Bug 315281 update copyrights for 3.6
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonViewer.java
* </p>
	 * 
	 * @see org.eclipse.jface.viewers.AbstractTreeViewer#getSelection()
	 */
	public ISelection getSelection() {
		if (cachedSelection == null) {
			cachedSelection = super.getSelection();
		}
		return cachedSelection;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.StructuredViewer#refresh(java.lang.Object)
	 */
	public void refresh(Object element) {
		refresh(element, true);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.StructuredViewer#update(java.lang.Object,
	 *      java.lang.String[])
	 */
	public void update(Object element, String[] properties) {
		if(element != getInput()) {
			INavigatorPipelineService pipeDream = contentService
					.getPipelineService();
	
			PipelinedViewerUpdate update = new PipelinedViewerUpdate();