Removes everything from the undo stack, discards all insertions and deletions, and restores updated objects to their last committed values.
- iOS 3.0+
- macOS 10.4+
- UIKit for Mac 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
This method does not refetch data from the persistent store or stores.
Sends an undo message to the context’s undo manager, asking it to reverse the latest uncommitted changes applied to objects in the object graph.
Sends a redo message to the context’s undo manager, asking it to reverse the latest undo operation applied to objects in the object graph.
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