Bug 89031 [Undo/Redo] IWorkbench#getOperationSupport() marked experimental
IWorkbench#getOperationSupport() marked experimental
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/operations/IOperationHistoryListener.java
/**
	 * Something of note has happened in the IOperationHistory. Listeners should
	 * check the supplied event for details.
	 * 
	 * @param event -
	 *            the OperationHistoryEvent that describes the particular
	 *            notification.
	 */
	void historyNotification(OperationHistoryEvent event);
}