# appending(_:) Composes this updatable temporal estimator with an updatable supervised temporal estimator. ``` @preconcurrency func appending(_ other: Other) -> some UpdatableSupervisedTemporalEstimator>, Other.Annotation> where Other : UpdatableSupervisedEstimator, 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)