# SearchBegin(HierarchySearchQueryDescriptor)

> Called when a new search query begins.

## Definition

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

```csharp
protected virtual void SearchBegin(HierarchySearchQueryDescriptor query)
```

### Parameters

**** (\[HierarchySearchQueryDescriptor]\(/engine/6000.5/script-reference/unity/hierarchy/hierarchysearchquerydescriptor)): The search query descriptor.