Extracting polymorphic serializer, sub with multiple bases

[agcom]

CodecRegistry documentation says If a class is registered under multiple polymorphic serializers, the chosen serializer is unpredictable.

There are clean workaround for this and are well known.

The workarounds include using the SerializationCodec` class.

However, the unpredictable behavior can be removed.

The idea is to declare an SerialInfo annotation and if multiple bases are present for a sub, then the base annotated with the declared annotation will take precedence.

Can call the annotation DefaultBase or something like that.