code: def setup_mappers(cls):
      class Jack(cls.Basic):
          pass
  
      class Port(cls.Basic):
          pass
  
file_path: sqlalchemy/test/orm/test_onetoone.py
imports: from sqlalchemy import ForeignKey
  from sqlalchemy import Integer
  from sqlalchemy import String
  from sqlalchemy import testing
  from sqlalchemy.orm import relationship
  from sqlalchemy.testing import fixtures
  from sqlalchemy.testing.fixtures import fixture_session
  from sqlalchemy.testing.schema import Column
  from sqlalchemy.testing.schema import Table
label_desc: Use image node_id 2 for calling the O2OTest obj's underlying member method code with example usage: obj.setup_mappers(cls) without return types