code: def test_teardown_taskgroup_decorator(self, dag_maker):
      with dag_maker():
          with pytest.raises(
              expected_exception=AirflowException,
              match="Task groups cannot be marked as setup or teardown.",
          ):
  
              @teardown
              @task_group
              def mygroup():
                  @task
                  def mytask():
                      print("I am a teardown task")
  
                  mytask()
  
              mygroup()
  
imports: from __future__ import annotations
  import pytest
  from airflow.decorators import setup, task, task_group, teardown
  from airflow.decorators.setup_teardown import context_wrapper
  from airflow.exceptions import AirflowException
  from airflow.operators.bash import BashOperator
label_desc: Use image node_id 8 for calling the TestSetupTearDownTask obj's underlying member method code with example usage: obj.test_teardown_taskgroup_decorator(dag_maker) without return types