Bug 190061 [Metadata] Update @since tags for new API
Patch to follow
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
* details. This support will likely be removed in Eclipse 3.2 in favor of
	 * proper support for multiple equal elements.
	 * </p>
	 * 
	 * @param widget
	 *            the widget
	 * @param element
	 *            the element
	 * @param doStruct
	 *            <code>true</code> if structural changes are to be picked up,
	 *            and <code>false</code> if only label provider changes are of
	 *            interest
	 * @param updateLabels
	 *            <code>true</code> to update labels for existing elements,
	 *            <code>false</code> to only update labels as needed, assuming
	 *            that labels for existing elements are unchanged.
	 * @since 3.1
	 */
	protected void internalRefresh(Widget widget, Object element,
			boolean doStruct, boolean updateLabels) {
		if (widget instanceof Item) {
			if (doStruct) {
				updatePlus((Item) widget, element);
			}
			if (updateLabels || !equals(element, widget.getData())) {
				doUpdateItem(widget, element, true);
			} else {
				associate(element, (Item) widget);
			}
		}