Global Variable



let kCFTypeSetCallBacks: CFSetCallBacks


Predefined CFSetCallBacks structure containing a set of callbacks appropriate for use when the values in a CFSet are all CFType-derived objects. The retain callback is CFRetain, the release callback is CFRelease, the copy callback is CFCopyDescription(_:), the equal callback is CFEqual(_:_:), and the hash callback is CFHash(_:). Therefore, if you use this constant when creating the collection, items are automatically retained when added to the collection, and released when removed from the collection.