STJ Polymorphic Serialization in Source Gen mode

I trying to remain AOT compatible for my library. I have a class that users can inherit from, so I'm unable to add the derived type attributes to the base type directly. I'm able to have the user register their custom types all in one place using a static method, and internally use a Modifier to add them to the list of derived types for that

JsonTypeInfo

JsonTypeInfo

. This works for reflection-based

DefaultJsonTypeInfoResolver

DefaultJsonTypeInfoResolver

, but no matter what I do, the delegate passed into

WithAddedModifier()

WithAddedModifier()

is never called if I use the source gen context and it just errors. Is there a way to add these in source gen mode?

Here's a gist: https://gist.github.com/markdibarry/354e2b9ed387e9b2f94088d2ad00c496

Gist

Polymorphic serialization with Source Gen

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