# Initialize(AllocatorHandle, int)

> Initialize a double rewindable allocators by allocating the allocators from backingAllocator and registering them.

## Definition

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

```csharp
public void Initialize(AllocatorManager.AllocatorHandle backingAllocator, int initialSizeInBytes)
```

### Parameters

**** (\[AllocatorHandle]\(/engine/6000.7/script-reference/unity/collections/allocatormanager/allocatorhandle)): Allocator used to allocate the double rewindable allocators.**** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): The initial capacity of the allocators, in bytes