Object forwarded to DLL-plugin as by copy(clone) or reference?

General Discussion
1

Hello!

When I have an object in FreeFEM++ (like a vertex) from a mesh, and deliver or forward this (vertex-)object to my C++ DLL (plugin), is this forwarded by copy or by reference?
Will the (vertex-)object only be a cloned object?

Greetings

2

Ok.
I think it’s by design only possible via reference.
Good.

Greetings