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# fitted(to:eventHandler:)

Fits a composed transformer to a data frame of examples.

```
func fitted(to input: DataFrame, eventHandler: EventHandler? = nil) async throws -> PreprocessingTabularEstimator<Preprocessor, Estimator>.Transformer
```

## Parameters

`input`

A data frame of examples.

`eventHandler`

An event handler.

## Return Value

The fitted transformer.

---

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