# invalidatedDecorationIndexPaths A dictionary containing the decoration views whose layout attributes are invalid. ``` var invalidatedDecorationIndexPaths: [NSCollectionView.DecorationElementKind : Set]? { get } ``` ## Discussion The keys in this dictionary are the element kind strings of the decoration views. The value for each key is an object containing one or more objects, each of which identifies the section containing the decoration view. --- 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)