Is there a way to override the "Base class" elimination but only for specific types

[richardpark-msft]

Event Grid system events uses the inheritance model in our TypeSpec models. typespec-go helpfully just removes those vestigial types, which is great, but sometimes you need to keep those types because they are actually models, not just composition types:

• MediaJobOutputStateChangeEventData
• MediaJobStateChangeEventData

This might just become a question with an easy answer (just decorate this with 'x'), but otherwise this is a bug. I have a workaround for now, where I literally just copied the old models over, but I'd love to remove those soon.

[tadelesh]

after this pr merge, you could use the new release to try with @usage.