# HierarchyView.GetTooltipEventHandler

> Delegate type used to handle the event of getting a tooltip for a HierarchyViewItem.

## Definition

* **Type:** Delegate
* **Namespace:** [Unity.Hierarchy](/engine/6000.7/script-reference/unity/hierarchy.md)
* **Assembly:** UnityEngine.HierarchyModule

```csharp
public delegate void HierarchyView.GetTooltipEventHandler(HierarchyView view, HierarchyViewItem item, StringBuilder tooltip, bool filtering)
```