code: def test_annoying_autoflush_one(self):
      sess = fixture_session()
  
      p1 = Parent()
      sess.add(p1)
      p1.children = []
  
imports: from sqlalchemy import ForeignKey
  from sqlalchemy import Integer
  from sqlalchemy import String
  from sqlalchemy import testing
  from sqlalchemy.orm import backref
  from sqlalchemy.orm import declarative_base
  from sqlalchemy.orm import relationship
  from sqlalchemy.orm.attributes import instance_state
  from sqlalchemy.testing import AssertsExecutionResults
  from sqlalchemy.testing import expect_warnings
  from sqlalchemy.testing import fixtures
  from sqlalchemy.testing.fixtures import fixture_session
  from sqlalchemy.testing.schema import Column
label_desc: Use image node_id 3 for calling the FlushOnPendingTest obj's underlying member method code with example usage: obj.test_annoying_autoflush_one() without return types