# DowncastMarkerElementCreatorFunction

typedef

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/conversion/downcasthelpers.ts#L3119)

#### Parameters

* `data: object`

  Properties

  * `data.isOpening?: boolean`
  * `data.markerName: string`
  * `data.markerRange: ModelRange`

* `conversionApi: DowncastConversionApi`

#### Returns

* `ViewUIElement | null`

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