# UpcastAttributeCreatorFunction

typedef

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/conversion/upcasthelpers.ts#L1218)

#### Parameters

* `modelElement: ModelElement`
* `conversionApi: UpcastConversionApi`

#### Returns

* `unknown`

---

Full index of the CKEditor 5 API reference: [llms.txt](llms.txt)