# RaiseItemsSourceChanged()

> Invokes the CollectionViewController.itemsSourceChanged event.

## Definition

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

```csharp
protected void RaiseItemsSourceChanged()
```