IMO the serializers should be their own standalone classes/modules which live separately from your application’s core types. You can invoke them when you need to do the serialization and keep parallel versions of them for legacy clients, etc.
ActiveModel::Serializers work like this in Rails, although I haven’t tried any similar approaches in statically-typed languages where protobuf is so commonly used.
ActiveModel::Serializers work like this in Rails, although I haven’t tried any similar approaches in statically-typed languages where protobuf is so commonly used.