@empathyco/x-components/docs/API-reference/api/x-components.mutationsdictionary.md

Empathy X Components

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[Home](./index.md) &gt; [@empathyco/x-components](./x-components.md) &gt; [MutationsDictionary](./x-components.mutationsdictionary.md)

## MutationsDictionary type

Util type for being used on generic constraints which will only accept an object containing mutations.

**Signature:**

```typescript
export type MutationsDictionary<Mutations> = Record<keyof Mutations, (payload?: any) => void>;
```

## Example

Example constraint

```typescript
 // This function allows receiving any object who only contains mutations;
 function sampleFunction\<Mutations extends MutationsDictionary\<Mutations\>\>
   (mutations: Mutations): void;
```