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# Interface: UnderlyingSourceCancelCallback

[internal](../modules/internal-8.md).UnderlyingSourceCancelCallback

## Callable

### UnderlyingSourceCancelCallback

▸ **UnderlyingSourceCancelCallback**(`reason?`): `void` \| [`PromiseLike`](internal-8.PromiseLike.md)<`void`\>

#### Parameters

| Name | Type |
| :------ | :------ |
| `reason?` | `any` |

#### Returns

`void` \| [`PromiseLike`](internal-8.PromiseLike.md)<`void`\>

#### Defined in

packages/medusa-js/node_modules/@types/node/stream/web.d.ts:94