---
title: FSVolume.SetXattrPolicy.mustCreate
framework: fskit
role: symbol
role_heading: Case
path: fskit/fsvolume/setxattrpolicy/mustcreate
---

# FSVolume.SetXattrPolicy.mustCreate

Set the value, but fail if the extended attribute already exists.

## Declaration

```swift
case mustCreate
```

## See Also

### Declaring a policy

- [FSVolume.SetXattrPolicy.alwaysSet](fskit/fsvolume/setxattrpolicy/alwaysset.md)
- [FSVolume.SetXattrPolicy.mustReplace](fskit/fsvolume/setxattrpolicy/mustreplace.md)
- [FSVolume.SetXattrPolicy.delete](fskit/fsvolume/setxattrpolicy/delete.md)