# IJobEntityChunkBeginEnd

> When added to an implemented IJobEntity the two functions will be called at the beginning and end of each chunk iteration.

## Definition

* **Type:** Interface
* **Namespace:** [Unity.Entities](/engine/7000.0/script-reference/unity/entities.md)
* **Assembly:** UnityEngine.EntitiesModule

```csharp
public interface IJobEntityChunkBeginEnd
```