# SystemBaseRegistry.ForwardingFunc

> Calls one of an unmanaged system's lifecycle methods. Generated code registers these for each system type.

## Definition

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

```csharp
public delegate void SystemBaseRegistry.ForwardingFunc(nint systemPtr, nint state)
```