# DowncastReduceChangesEventData

typedef

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/conversion/downcastdispatcher.ts#L731)

<a id="properties">

## Properties

<a id="member-changes">

### `changes: Iterable<DifferItem | DifferItemReinsert>`

A buffered changes to get reduced.

<a id="member-refreshedItems">

### `refreshedItems: Set<ModelItem>`

Set of items marked for rebuild without reusing view nodes.

#### Value

`object`

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