# Update()

> Updates the hierarchy view model and requests a rebuild of the list of HierarchyNode that filters the HierarchyFlattened.

## Definition

* **Type:** Method
* **Namespace:** [Unity.Hierarchy](/engine/6000.5/script-reference/unity/hierarchy.md)
* **Assembly:** UnityEngine.HierarchyCoreModule

```csharp
public void Update()
```