# UpdatePrefabInstancesEventArgs(Scene, ReadOnly)

> Constructs a new instance.

## Definition

* **Type:** Constructor
* **Namespace:** [UnityEditor](/engine/6000.3/script-reference/unityeditor.md)
* **Assembly:** UnityEditor

```csharp
public UpdatePrefabInstancesEventArgs(Scene scene, NativeArray<int>.ReadOnly instanceIds)
```

### Parameters

**** (\[Scene]\(/engine/6000.3/script-reference/unityengine/scenemanagement/scene)): The scene containing all of the prefab instances that have been updated.**** (\[ReadOnly]\(/engine/6000.3/script-reference/unity/collections/nativearray1/readonly)): The instance ID for each root [GameObject](/engine/6000.3/script-reference/unityengine/gameobject.md) of the prefab instances that have been updated.