# customStream(instance:) Returns a new archive byte stream instance mapped to an object that conforms to the archive byte stream protocol. ``` static func customStream(instance: C) -> ArchiveByteStream? where C : AnyObject, C : ArchiveByteStreamProtocol ``` ## Parameters `instance` The object that the new archive stream wraps. ## Return Value A new archive byte stream. --- 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)