---
title: USDStage.ObservationToken
framework: usdkit
role: symbol
role_heading: Structure
platforms: [iOS 27.0+, iPadOS 27.0+, Mac Catalyst 27.0+, macOS 27.0+, tvOS 27.0+, visionOS 27.0+]
path: usdkit/usdstage/observationtoken
---

# USDStage.ObservationToken

## Declaration

```swift
struct ObservationToken
```

## Relationships

### Conforms To

- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Observing changes

- [addObserver(for:using:)](usdkit/usdstage/addobserver(for:using:).md)
- [USDStage.Notice](usdkit/usdstage/notice.md)
- [USDStage.ObjectsDidChange](usdkit/usdstage/objectsdidchange.md)