---
title: group
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/collisionfilter/group
---

# group

The collision group or groups, stored as a bit mask, to which the entity belongs.

## Declaration

```swift
var group: CollisionGroup
```

## See Also

### Customizing groups

- [mask](realitykit/collisionfilter/mask.md)