<!--
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  "identifier" : "/documentation/TVMLKit/TVDocumentViewControllerDelegate/documentViewControllerWillUpdate(_:)",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
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  "title" : "documentViewControllerWillUpdate(_:)"
}
-->

# documentViewControllerWillUpdate(_:)

Tells the delegate that the document will be updated.

```
optional func documentViewControllerWillUpdate(_ documentViewController: TVDocumentViewController)
```

---

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