# LazyFilterCollection A lazy `Collection` wrapper that includes the elements of an underlying collection that satisfy a predicate. ``` typealias LazyFilterCollection = LazyFilterSequence where T : Collection ``` ## Discussion> Note: The performance of accessing `startIndex`, `first`, any methods > that depend on `startIndex`, or of advancing an index depends > on how sparsely the filtering predicate is satisfied, and may not offer > the usual performance given by `Collection`. Be aware, therefore, that > general operations on `LazyFilterCollection` instances may not have the > documented complexity. --- 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)