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# outlineView(_:itemForPersistentObject:)

Invoked by `outlineView` to return the item for the archived `object`.

```
@MainActor optional func outlineView(_ outlineView: NSOutlineView, itemForPersistentObject object: Any) -> Any?
```

## Parameters

`outlineView`

The outline view that sent the message.

`object`

An archived representation of an item in `outlineView`’s data source.

## Return Value

The unarchived item corresponding to `object`. If the item is an archived object, this method may return the object.

## Discussion

When the outline view is restoring the saved expanded items, this method is called for each expanded item, to translate the archived object to an outline view item.

### Special Considerations

You must implement this method if you are automatically saving expanded items (that is, if [`autosaveExpandedItems`](/documentation/AppKit/NSOutlineView/autosaveExpandedItems) returns <doc://com.apple.documentation/documentation/Swift/true>).

---

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