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# translatesReferenceBoundsIntoBoundary

Specifies whether a boundary based on the reference system is active.

```
var translatesReferenceBoundsIntoBoundary: Bool { get set }
```

## Discussion

To specify a collision boundary based on the reference system, use the [`setTranslatesReferenceBoundsIntoBoundary(with:)`](/documentation/UIKit/UICollisionBehavior/setTranslatesReferenceBoundsIntoBoundary(with:)) method.

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