# passUnretained(_:) Creates an unmanaged reference without performing an unbalanced retain. ``` static func passUnretained(_ value: Instance) -> Unmanaged ``` ## Parameters `value` A class instance. ## Return Value An unmanaged reference to the object passed as `value`. ## Discussion This is useful when passing a reference to an API which Swift does not know the ownership rules for, but you know that the API expects you to pass the object at +0. ``` CFArraySetValueAtIndex(.passUnretained(array), i, .passUnretained(object)) ``` --- 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)