Bug 135284 [Viewers] API: need to add methods to StructuredViewer to support ViewerComparator
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/StructuredViewer.java
result = (Object[]) result.clone();
			sorter.sort(this, result);
		}
		return result;
	}
	/**
	 * Returns this viewer's sorter, or <code>null</code> if it does not have
	 * one.
	 * 
	 * @return a viewer sorter, or <code>null</code> if none
	 */
	public ViewerSorter getSorter() {
		return sorter;
	}
	/**
	 * Handles a double-click select event from the widget.
	 * <p>
	 * This method is internal to the framework; subclassers should not call
	 * this method.
	 * </p>
	 * 
	 * @param event
	 *            the SWT selection event
	 */
	protected void handleDoubleSelect(SelectionEvent event) {
		
		
		
		Control control = getControl();
		if (control != null && !control.isDisposed()) {