Bug 89031 [Undo/Redo] IWorkbench#getOperationSupport() marked experimental
IWorkbench#getOperationSupport() marked experimental
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/operations/IOperationHistory.java
* 
	 * @param operation -
	 *            the composite operation to be considered as the parent for all
	 *            subsequent operations.
	 * @param mode -
	 *            the mode the operation is executing in. Can be one of
	 *            <code>EXECUTE</code>, <code>UNDO</code>, or
	 *            <code>REDO</code>.  This determines what notifications are sent.
	 * 
	 * <p>
	 * EXPERIMENTAL - this protocol is experimental and may change signficantly
	 * or be removed before the final release.
	 */
	void openOperation(ICompositeOperation operation, int mode);
	/**
	 * <p>
	 * The specified operation has changed in some way since it was added to the
	 * operation history. Notify listeners with an OPERATION_CHANGED event.
	 * 
	 * @param operation -
	 *            the operation that has changed.
	 * 
	 * <p>
	 * EXPERIMENTAL - this protocol is experimental and may change signficantly
	 * or be removed before the final release.
	 */
	void operationChanged(IUndoableOperation operation);
	/**
	 * Get the operation that will next be undone in the given context. This
	 * method is used to retrieve the label or description as needed for the