code: def setup_mappers(cls):
      foo = cls.tables.foo
  
      class Foo(cls.Basic):
          pass
  
      cls.mapper_registry.map_imperatively(Foo, foo)
  
imports: import sqlalchemy
  from sqlalchemy import ForeignKey
  from sqlalchemy import func
  from sqlalchemy import Integer
  from sqlalchemy import testing
  from sqlalchemy.orm import relationship
  from sqlalchemy.testing import config
  from sqlalchemy.testing import eq_
  from sqlalchemy.testing import fixtures
  from sqlalchemy.testing.fixtures import fixture_session
  from sqlalchemy.testing.provision import normalize_sequence
  from sqlalchemy.testing.schema import Column
  from sqlalchemy.testing.schema import Table
  from test.orm import _fixtures
label_desc: Use image node_id 3 for calling the GenerativeQueryTest obj's underlying member method code with example usage: obj.setup_mappers(cls) without return types