# Handler

> Gets the HierarchyNodeTypeHandler type used to manage the nodes for this cell. Only one cell descriptor per handler type can be registered in a column.

## Definition

* **Type:** Property
* **Namespace:** [Unity.Hierarchy.Editor](/engine/6000.7/script-reference/unity/hierarchy/editor.md)
* **Assembly:** UnityEditor

```csharp
public Type Handler { get; }
```