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# registryDidChangeNotification

Posted whenever the image representation class registry changes.

```
class let registryDidChangeNotification: NSNotification.Name
```

## Discussion

The notification object is the image class that is registered or unregistered. This notification does not contain a `userInfo` dictionary.

To observe this notification using Swift concurrency, use [`NSImageRep.RegistryDidChangeMessage`](/documentation/AppKit/NSImageRep/RegistryDidChangeMessage).

---

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