---
displayed_sidebar: jsClientSidebar
---

# Interface: UnderlyingSinkCloseCallback

[internal](../modules/internal-10.md).UnderlyingSinkCloseCallback

## Callable

### UnderlyingSinkCloseCallback

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

#### Returns

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

#### Defined in

docs-util/node_modules/typescript/lib/lib.dom.d.ts:26878