# AsReadOnlySpan()

> Returns a read-only span of all hierarchy nodes in the view model.

## Definition

* **Type:** Method
* **Namespace:** [Unity.Hierarchy](/engine/6000.6/script-reference/unity/hierarchy.md)
* **Assembly:** UnityEngine.HierarchyCoreModule

```csharp
public ReadOnlySpan<HierarchyNode> AsReadOnlySpan()
```

### Returns

| Type                                                                                         | Description                          |
| -------------------------------------------------------------------------------------------- | ------------------------------------ |
| [ReadOnlySpan\<HierarchyNode>](https://learn.microsoft.com/dotnet/api/system.readonlyspan-1) | A read-only span of hierarchy nodes. |