---
title: NSUndoManagerGroupIsDiscardableKey
framework: foundation
role: symbol
role_heading: Global Variable
path: foundation/nsundomanagergroupisdiscardablekey
---

# NSUndoManagerGroupIsDiscardableKey

A key, used in a notification’s user info, that indicates the undo group contains only discardable actions.

## Declaration

```swift
let NSUndoManagerGroupIsDiscardableKey: String
```

## Discussion

Discussion The key has a corresponding value of true, wrapped as a Boolean NSNumber object, if the undo group as a whole is discardable.

## See Also

### Working with notifications

- [NSUndoManagerWillUndoChange](foundation/nsnotification/name-swift.struct/nsundomanagerwillundochange.md)
- [NSUndoManagerDidUndoChange](foundation/nsnotification/name-swift.struct/nsundomanagerdidundochange.md)
- [NSUndoManagerWillRedoChange](foundation/nsnotification/name-swift.struct/nsundomanagerwillredochange.md)
- [NSUndoManagerDidRedoChange](foundation/nsnotification/name-swift.struct/nsundomanagerdidredochange.md)
- [NSUndoManagerCheckpoint](foundation/nsnotification/name-swift.struct/nsundomanagercheckpoint.md)
- [NSUndoManagerDidOpenUndoGroup](foundation/nsnotification/name-swift.struct/nsundomanagerdidopenundogroup.md)
- [NSUndoManagerWillCloseUndoGroup](foundation/nsnotification/name-swift.struct/nsundomanagerwillcloseundogroup.md)
- [NSUndoManagerDidCloseUndoGroup](foundation/nsnotification/name-swift.struct/nsundomanagerdidcloseundogroup.md)