# OnSeparatorContextualMenuEvent(ContextualMenuPopulateEvent, int)

> This method is automatically called when a contextual menu is about to appear on a StackNode separator.

## Definition

* **Type:** Method
* **Namespace:** [UnityEditor.Experimental.GraphView](/engine/6000.6/script-reference/unityeditor/experimental/graphview.md)
* **Assembly:** UnityEditor

```csharp
protected virtual void OnSeparatorContextualMenuEvent(ContextualMenuPopulateEvent evt, int separatorIndex)
```

### Parameters

**** (\[ContextualMenuPopulateEvent]\(/engine/6000.6/script-reference/unityengine/uielements/contextualmenupopulateevent)): The event.**** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): The index of the separator on which the menu was invoked.