# requiredUserInfoKeys A set of keys that represent the minimal information about the activity that should be stored for later restoration. ``` var requiredUserInfoKeys: Set? { get set } ``` ## Discussion The keys come from the [`userInfo`](/documentation/Foundation/NSUserActivity/userInfo) property. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)