# FILE_SYNC_WAIT_BEFORE

`import { FILE_SYNC_WAIT_BEFORE } from "destack:fs/binding";`

Wait for earlier writeback in the requested range.

```ds title="FILE_SYNC_WAIT_BEFORE"
const FILE_SYNC_WAIT_BEFORE: FileSyncFlags
```

[language/library/src/fs/binding/file.ds:135](https://github.com/destack-sh/destack/blob/main/language/library/src/fs/binding/file.ds#L135)