Performs the undo operations in the last undo group (whether top-level or nested), recording the operations on the redo stack as a single group.
- iOS 3.0+
- macOS 10.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
NSInternal if any undo operations have been registered since the last
This method posts an
NSUndo before it performs the undo operation, and it posts an
NSUndo after it performs the undo operation.