Type for Row link? or Row?

I’m trying to do:
Use Pydantic to create a class that has Rows or links to Rows as an attribute.

This does not work:

from anvil.tables import Row
from pydantic import BaseModel
class Type1(BaseModel):
  name:str
  user_row: Row
  link_to_user_Row: anvil._server.LiveObjectProxy

This does work:

from typing import Any
from pydantic import BaseModel
class Type1(BaseModel):
  name:str
  link_to_user_Row: Any