Yes, it's difficult by default, but the solution is https://en.wikipedia.org/wiki/Opaque_pointer https://en.wikipedia.org/wiki/Opaque_pointer and it is quite we

Yes, it's difficult by default, but the solution is https://en.wikipedia.org/wiki/Opaque_pointer https://en.wikipedia.org/wiki/Opaque_pointer and it is quite well-known in the C++ world.