# itemsSource

> Access to the itemsSource. For a TreeView, the source contains the items wrappers.

## Definition

* **Type:** Property
* **Namespace:** [UnityEngine.UIElements](/engine/6000.3/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule

```csharp
public IList itemsSource { get; }
```

### Remarks

To set the items source, use SetRootItems\_1 instead, which allows fully typed items.