# ContextualMenuManipulator(Action<ContextualMenuPopulateEvent>)

> Constructor.

## Definition

* **Type:** Constructor
* **Namespace:** [UnityEngine.UIElements](/engine/6000.5/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule

```csharp
public ContextualMenuManipulator(Action<ContextualMenuPopulateEvent> menuBuilder)
```

### Parameters

**** (\[Action\<ContextualMenuPopulateEvent>]\(https\://learn.microsoft.com/dotnet/api/system.action)):&#x20;