# Builder(Allocator)

> Constructs a new instance.

## Definition

* **Type:** Constructor
* **Namespace:** [UnityEditor](/engine/6000.7/script-reference/unityeditor.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
public Builder(Allocator allocator)
```

### Parameters

**** (\[Allocator]\(/engine/6000.7/script-reference/unity/collections/allocator)): The allocator to use.