# withMutableTransforms(_:) Updates the per instance transform data synchronously on the CPU. ``` final func withMutableTransforms(_ callback: (UnsafeMutableBufferPointer) -> Void) ``` ## Discussion The transform buffer provided is only valid for the lifetime of the callback. --- 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)