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# extendedInterfaceCreator

The interface that is being extended.

```
var extendedInterfaceCreator: (any TVInterfaceCreating)? { get set }
```

## Discussion

An app can extend or override framework implementation by setting the [`extendedInterfaceCreator`](/documentation/TVMLKit/TVInterfaceFactory/extendedInterfaceCreator) property. An app must provide its own methods to handle custom registered elements.

---

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