# TabularTransformerToEstimatorAdaptor A tabular estimator that always returns a predefined tabular transformer. ``` struct TabularTransformerToEstimatorAdaptor where Transformer : TabularTransformer ``` ## Topics ### Creating an estimator [`init(Transformer)`](/documentation/CreateMLComponents/TabularTransformerToEstimatorAdaptor/init(_:)) Creates a trivial tabular estimator. ### Getting the transformer [`let transformer: Transformer`](/documentation/CreateMLComponents/TabularTransformerToEstimatorAdaptor/transformer) A pre-defined tabular transformer. ### Encoding and decoding [`func encode(Transformer, to: inout any EstimatorEncoder) throws`](/documentation/CreateMLComponents/TabularTransformerToEstimatorAdaptor/encode(_:to:)) Does nothing since this tabular estimator uses a pre-defined tabular transformer. [`func decode(from: inout any EstimatorDecoder) throws -> Transformer`](/documentation/CreateMLComponents/TabularTransformerToEstimatorAdaptor/decode(from:)) Returns the pre-defined tabular transformer. ### Fitting [`func fitted(to: DataFrame, eventHandler: EventHandler?) async throws -> Transformer`](/documentation/CreateMLComponents/TabularTransformerToEstimatorAdaptor/fitted(to:eventHandler:)) Returns the pre-defined tabular transformer. ## Relationships ### Conforms To [`Sendable`](/documentation/Swift/Sendable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`TabularEstimator`](/documentation/CreateMLComponents/TabularEstimator) --- 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)