# Rewind()

> Rewind the allocator; invalidate all allocations made from it, and potentially also free memory blocks it has allocated from the system.

## Definition

* **Type:** Method
* **Namespace:** [Unity.Collections](/engine/6000.7/script-reference/unity/collections.md)
* **Assembly:** UnityEngine.ManagedKernelModule

```csharp
public void Rewind()
```