Bug 126658 [CommonNavigator] [DND] Complete definition of DND API
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonViewer.java
ViewerSorter sorter = getSorter();
		if (sorter != null) {
			
			result = (Object[]) result.clone();
			
			((TreeViewerSorter) sorter).sort(this, parent, result);
		}
		return result;
	}
	/**
	 * Adds the given child elements to this viewer as children of the given
	 * parent element.
	 * <p>
	 * EXPERIMENTAL. Not to be used except by JDT. This method was added to
	 * support JDT's explorations into grouping by working sets, which requires
	 * viewers to support multiple equal elements. See bug 76482 for more
	 * details. This support will likely be removed in Eclipse 3.2 in favour of
	 * proper support for multiple equal elements.
	 * </p>
	 * 
	 * @param widget
	 *            the widget for the parent element
	 * @param parentElement
	 *            the parent element
	 * @param childElements
	 *            the child elements to add
	 * @since 3.1
	 */
	protected void internalAdd(Widget widget, Object parentElement,
			Object[] childElements) {