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

# applied(to:eventHandler:)

Performs the transformation on a single input.

## Declaration

```swift
func applied(to input: Self.Input, eventHandler: EventHandler?) async throws -> Self.Output
```

## Parameters

- `input`: The transformer input.
- `eventHandler`: An event handler.

## Return Value

Return Value An output produced by applying the transformer to the input.

## See Also

### Applying and adapting

- [adaptedAsAnnotatedFeatureTransformer(annotationType:)](createmlcomponents/transformer/adaptedasannotatedfeaturetransformer(annotationtype:).md)
- [adaptedAsAnnotatedPredictionTransformer(annotationType:)](createmlcomponents/transformer/adaptedasannotatedpredictiontransformer(annotationtype:).md)
- [adaptedAsEstimator()](createmlcomponents/transformer/adaptedasestimator().md)
- [adaptedAsRandomTransformer()](createmlcomponents/transformer/adaptedasrandomtransformer().md)
- [adaptedAsTemporal()](createmlcomponents/transformer/adaptedastemporal().md)
- [adaptedAsUpdatableEstimator()](createmlcomponents/transformer/adaptedasupdatableestimator().md)
- [Input](createmlcomponents/transformer/input.md)
- [Output](createmlcomponents/transformer/output.md)