---
title: CFTreeReleaseCallBack
framework: Core Foundation
role: symbol
role_heading: Type Alias
path: corefoundation/cftreereleasecallback
---

# CFTreeReleaseCallBack

Callback function used to release a previously retained program-defined information pointer.

## Declaration

```swift
typealias CFTreeReleaseCallBack = (UnsafeRawPointer?) -> Void
```

## Parameters

- `info`: The program-supplied information pointer provided in a doc://com.apple.corefoundation/documentation/CoreFoundation/CFTreeContext structure.

## See Also

### Callbacks

- [CFTreeApplierFunction](corefoundation/cftreeapplierfunction.md)
- [CFTreeCopyDescriptionCallBack](corefoundation/cftreecopydescriptioncallback.md)
- [CFTreeRetainCallBack](corefoundation/cftreeretaincallback.md)