Is there any way to do unsafe conversion of one ref object type to another in VM? I can't do `cast[B](a)` in a macros (not for arbitrary types `'cast' from tyRef to tyRef`). I tried doing it in several steps, like `a -> int -> b`, but this does not work either, (`'cast' from tyInt to tyRef`).
Any hack would be acceptable, I need it to test an (unrelated to the question and probably quite stupid) idea, so it does not matter how bad the conversion implementation is. Basically anything that would let me do `let itemB: TypeB = <???>(itemA)` for arbitrary types and not blow up the compiler in the process.
