Is it possible to swap a script in a prefab variant?

Let's say B and C are subclasses of class A. Is it possible to make a prefab variant that has C in the place of B used by the original prefab?

I tried this in Editor and even though it's possible to swap the script like it has been somewhat always in Unity, this particular change doesn't get saved in the prefab variant, so once I open the variant again, it still has the original script. I tried to do this by modifying the YAML file manually, but didn't succeed in that either.

So the question is: is this currently in any way possible? And if not, is there a plan to add support for this?

I'm using Unity version 2018.4.2.

 

It's not possible. See this thread:
https://forum.unity.com/threads/prefab-variant-with-derived-class.661873/

 

Ok, that's a pity, but thanks for the answer. Already did a workaround for it, although it's less optimal than what I was initially going for.