# ComponentSystemGroupExtensions

> Obsolete. This class only contains deprecated extension methods.

## Definition

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

> **Warning:**
>
> **Deprecated.** This class will soon be empty and will be removed. (RemovedAfter Entities 1.0)

```csharp
public static class ComponentSystemGroupExtensions
```