# withUnsafeContinuation(isolation:_:) Source-compatibility overload; replaced by [`withUnsafeContinuation(_:)`](/documentation/Swift/withUnsafeContinuation(_:)). ``` func withUnsafeContinuation(isolation: isolated (any Actor)?, _ fn: (UnsafeContinuation) -> Void) async -> sending T ``` --- 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)