A Boolean value that indicates whether the managed object has unsaved changes.
- iOS 3.0+
- macOS 10.4+
- tvOS 9.0+
- watchOS 2.0+
- Core Data
YES if the receiver has unsaved changes, otherwise
NO. The receiver has unsaved changes if it has been updated since its managed object context was last saved.
If the receiver is a fault, accessing this property does not cause it to fire.