---
title: "fitted(to:eventHandler:)"
framework: createmlcomponents
role: symbol
role_heading: Instance Method
path: "createmlcomponents/transformertoupdatableestimatoradaptor/fitted(to:eventhandler:)"
---

# fitted(to:eventHandler:)

Returns the pre-defined transformer.

## Declaration

```swift
func fitted<S>(to input: S, eventHandler: EventHandler? = nil) async throws -> Transformer where S : Sequence, Transformer.Input == S.Element
```

## Parameters

- `input`: A sequence of examples.
- `eventHandler`: An event handler.

## Return Value

Return Value The pre-defined transformer.

## See Also

### Fitting and updating

- [makeTransformer()](createmlcomponents/transformertoupdatableestimatoradaptor/maketransformer().md)
- [update(_:with:eventHandler:)](createmlcomponents/transformertoupdatableestimatoradaptor/update(_:with:eventhandler:).md)