# describe Points to the function that produces an autoreleased NSString * describing the given element. If `NULL`, then the hash table produces a generic string description. ``` var describe: ((NSHashTable, UnsafeRawPointer) -> String?)? ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)