Bug 89137 [JFace] - API Review - "temporary" API in AbstractTreeViewer
AbstractTreeViewer contains two methods documented as "temporary" internalRefresh(Widget, Object) internalAdd(Widget, Object, Object [])
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/StructuredViewer.java
/**
	 * Copies attributes of the given element into the given widget.
	 * <p>
	 * This method is internal to the framework; subclassers should not call
	 * this method. Calls <code>doUpdateItem(widget, element, true)</code>.
	 * </p>
	 * 
	 * @param widget
	 *            the widget
	 * @param element
	 *            the element
	 */
	protected final void updateItem(Widget widget, Object element) {
		SafeRunnable.run(new UpdateItemSafeRunnable(widget, element, true));
	}
	/**
	 * Updates the selection of this viewer.
	 * <p>
	 * This framework method should be called when the selection in the viewer
	 * widget changes.
	 * </p>
	 * <p>
	 * The default implementation of this method notifies all selection change
	 * listeners recorded in an internal state variable. Overriding this method
	 * is generally not required; however, if overriding in a subclass,
	 * <code>super.updateSelection</code> must be invoked.
	 * </p>
	 * 
	 * @param selection
	 *            the selection, or <code>null</code> if none