How can deserialization of polymorphic trait objects be added in Rust if at all?

Question

I\'m trying to solve the problem of serializing and deserializing Box. I know that in the case of a closed type hierarchy, the recommended way

Answer 1

All your libraries could provide a registration routine, guarded by std::sync::Once, that register some identifier into a common static mut, but obviously your program must call them all.

I've no idea if TypeId yields consistent values across recompiles with different dependencies.