[Home](./index.md) > [@empathyco/x-components](./x-components.md) > [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 = Record void>; ``` ## Example Example constraint ```typescript // This function allows receiving any object who only contains mutations; function sampleFunction\\> (mutations: Mutations): void; ```