> Also, using a `oneof` field is correctly typed on the frontend as

    myfield: TypeA | TypeB | TypeC

But what about when the `oneof` has multiple variants with the same base type? Like:

    message User {
        oneof contact_info {
            string email = 1;
            string phone_number = 2;
        }
    }

Does this get compiled down to `contact_info: string | string` on the frontend? How do you tell which variant was used without encoding the discriminant?