Probably not possible without doing one of these t...

# announcements

[Marc Knaup]

Probably not possible without doing one of these things:
• Let all data classes implement a specific custom interface (like Copyable) -> work for the API user
• Let the API user pass a closure which copies the object -> work for the API user
• Use a lot of reflection -> no work for the API user, much work for you, probably unstable and slow
• Change the architecture completely without relying on mutable properties (difficult to tell since I don’t know your architecture)