Bug 315281 update copyrights for 3.6
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonViewer.java
});
    }
	/**
	 * Update an item in the tree.
	 * 
	 * @param item the item in the tree to update
	 * @since 3.4
	 * 
	 */
	public void doUpdateItem(Widget item) {
		doUpdateItem(item, item.getData(), true);
	}
	/*
	 * @see StructuredViewer#mapElement(Object, Widget)
	 */
	protected void mapElement(Object element, Widget item) {
		super.mapElement(element, item);
		if (_mapper != null && item instanceof Item) {
			_mapper.addToMap(element, (Item) item);
		}
	}
	/*
	 * @see StructuredViewer#unmapElement(Object, Widget)
	 */
	protected void unmapElement(Object element, Widget item) {
		if (_mapper != null && item instanceof Item) {
			_mapper.removeFromMap(element, (Item) item);
		}
		super.unmapElement(element, item);
	}