# Type Alias: UnsubscribeFn()

> 

> **UnsubscribeFn**: () => `void`

Defined in: [packages/server/src/observable/types.ts:7](https://github.com/trpc/trpc/blob/57482b0bb09dce5c838dc8bf5727a943488bac61/packages/server/src/observable/types.ts#L7)

Stops a subscription.

## Returns

`void`