class_docstr: run some compile tests, even though these are redundant.
class_docstr_tok: ["run","some","compile","tests",",","even","though","these","are","redundant","."]
code: def setup_mappers(cls):
      User, users = cls.classes.User, cls.tables.users
      Address, addresses = cls.classes.Address, cls.tables.addresses
      cls.mapper_registry.map_imperatively(
          User, users, properties={"addresses": relationship(Address)}
      )
      cls.mapper_registry.map_imperatively(Address, addresses)
  
imports: from sqlalchemy import exc
  from sqlalchemy import testing
  from sqlalchemy.engine import default
  from sqlalchemy.orm import joinedload
  from sqlalchemy.orm import relationship
  from sqlalchemy.testing import assert_raises_message
  from sqlalchemy.testing import AssertsCompiledSQL
  from sqlalchemy.testing import eq_
  from sqlalchemy.testing.fixtures import fixture_session
  from test.orm import _fixtures
label_desc: Use image node_id 1 for calling the CompileTest obj's underlying member method code with example usage: obj.setup_mappers(cls) without return types