Bug 141192 [Viewers] Javadoc change about multiple equal elements in StructuredViewer and AbstractTreeViewer
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/StructuredViewer.java
*            selection, or <code>false</code> otherwise
	 */
	protected void setSelectionToWidget(ISelection selection, boolean reveal) {
		if (selection instanceof IStructuredSelection) {
			setSelectionToWidget(((IStructuredSelection) selection).toList(), reveal);
		} else {
			setSelectionToWidget((List) null, reveal);
		}
	}
	/**
	 * Sets this viewer's sorter and triggers refiltering and resorting of this
	 * viewer's element. Passing <code>null</code> turns sorting off.  
     * <p>
     * It is recommended to use <code>setComparator()</code> instead.
     * </p>
	 * 
	 * @param sorter
	 *            a viewer sorter, or <code>null</code> if none
	 */
	public void setSorter(ViewerSorter sorter) {
		if (this.sorter != sorter) {
			this.sorter = sorter;
			refresh();
		}
	}
	/**
	 * Sets this viewer's comparator to be used for sorting elements, and triggers refiltering and 
	 * resorting of this viewer's element.  <code>null</code> turns sorting off.
	 * To get the viewer's comparator, call <code>getComparator()</code>.
     * <p>