# withUnsafeMutablePointers(_:) Call `body` with `UnsafeMutablePointer`s to the stored `Header` and raw `Element` storage. ``` func withUnsafeMutablePointers(_ body: (UnsafeMutablePointer

, UnsafeMutablePointer) throws(E) -> R) throws(E) -> R where E : Error, R : ~Copyable ``` ## Discussion> Note: These pointers are valid only for the duration of the > call to `body`. The caller is responsible for ensuring that > the buffer is not being accessed elsewhere while performing > this call. --- 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)