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# didApplyChanges(instanceIdentifier:operationIdentifier:)

An event emitted to the ChangelistDelegate indicating the end of a USD change.

```
@MainActor func didApplyChanges(instanceIdentifier: String, operationIdentifier: UInt)
```

## Parameters

`instanceIdentifier`

the Spatial Preview receiver instance making the change.

`operationIdentifier`

multiple changes with the same operation identifier can be grouped together.

---

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