public final void treeCollapsed(final TreeExpansionEvent event) {  }   public final void treeExpanded(final TreeExpansionEvent event) { final Object element= event.getElement(); if (getChecked(element)) { setSubTreeGrayed(element, false); setSubtreeChecked(element, true); } }
		public RefactoringHistoryTreeViewer(final Composite parent, final int style) {			super(parent, style);			addCheckStateListener(new ICheckStateListener() {				/**				 * {@inheritDoc}				 */				public final void checkStateChanged(final CheckStateChangedEvent event) {					updateCheckState(event.getElement(), event.getChecked());					handleCheckStateChanged();				}			});		}