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# outlineView(_:rowViewForItem:)

implement this method to return a custom `NSTableRowView` for a particular item.

```
@MainActor optional func outlineView(_ outlineView: NSOutlineView, rowViewForItem item: Any) -> NSTableRowView?
```

## Parameters

`outlineView`

The outline view that sent the message.

`item`

The item displayed by the returned table row view.

## Return Value

An instance or subclass of `NSTableRowView`. If `nil` is returned, a `NSTableRowView` instance is created and used.

## Discussion

This method, if implemented, is only invoked for NSView-based outline views.

---

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