xattr_name_with_flags(3) on macOS
The text 63840d387b55, as macOS 14.6, macOS 14.5, macOS 14.4, macOS 14.3, macOS 14.2, macOS 14.1, macOS 14.0, macOS 13.5, macOS 13.4, macOS 13.3, macOS 13.2, macOS 13.1, macOS 13.0 shipped it.
obtain properties related to extended attributes, for use in copying