---
title: kCFStringBinaryHeapCallBacks
framework: corefoundation
role: symbol
role_heading: Global Variable
path: corefoundation/kcfstringbinaryheapcallbacks
---

# kCFStringBinaryHeapCallBacks

Predefined CFBinaryHeapCallBacks structure containing a set of callbacks appropriate for use when the values in a binary heap are all CFString objects.

## Declaration

```swift
let kCFStringBinaryHeapCallBacks: CFBinaryHeapCallBacks
```