---
title: ARSession.CollaborationData.Priority.critical
framework: arkit
role: symbol
role_heading: Case
path: arkit/arsession/collaborationdata/priority-swift.enum/critical
---

# ARSession.CollaborationData.Priority.critical

A priority that indicates that collaboration depends on this data.

## Declaration

```swift
case critical
```

## Discussion

Discussion ARKit sets the data priority to  ARSession.CollaborationData.Priority.critical  when it’s needed to establish or continue a collaborative session.