# RaiseOnSizeChanged()

> Invokes the _itemsSourceSizeChanged event.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine.UIElements](/engine/6000.6/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule

```csharp
protected void RaiseOnSizeChanged()
```