# appending(_:) Composes this temporal estimator with a supervised temporal estimator. ``` @preconcurrency func appending(_ other: Other) -> some SupervisedTemporalEstimator>, Other.Annotation> where Other : SupervisedEstimator, Other.Annotation : Sendable, Self.Transformer.Output == Other.Transformer.Input ``` --- 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)