# CheckedStateRef

> The SystemState for this SystemBase.

## Definition

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

```csharp
public ref SystemState CheckedStateRef { get; }
```

### Remarks

All systems are backed by a [SystemState](/engine/7000.0/script-reference/unity/entities/systemstate.md). This may be required in, for example, general purpose utility methods containing a `ref <see cref="Unity.Entities.SystemState"></see>` parameter.