Bug 89031 [Undo/Redo] IWorkbench#getOperationSupport() marked experimental
IWorkbench#getOperationSupport() marked experimental
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/operations/ICompositeOperation.java
/**
	 * Add the specified operation as a child of this operation.
	 * 
	 * @param operation - the operation to be added
	 */
	void add(IUndoableOperation operation);
	
	/**
	 * Remove the specified operation from this operation.
	 * 
	 * @param operation - the operation to be removed
	 */
	void remove(IUndoableOperation operation);
}