---
id: fast-foundation.transformer_2
title: Transformer\_2 type
hide_title: true
---
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[@microsoft/fast-foundation](./fast-foundation.md) &gt; [Transformer\_2](./fast-foundation.transformer_2.md)

## Transformer\_2 type

Transforms an object after it is created but before it is returned to the requestor.

<b>Signature:</b>

```typescript
export declare type Transformer<K> = (instance: Resolved<K>) => Resolved<K>;
```