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# encodeWithOptimizer(_:to:)

Encodes the transformer and optimizer to an encoder.

```
func encodeWithOptimizer(_ transformer: PreprocessingUpdatableEstimator<Preprocessor, Estimator>.Transformer, to encoder: inout any EstimatorEncoder) throws
```

## Parameters

`transformer`

A transformer this estimator creates.

`encoder`

An encoder.

---

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