Ensure that this works:

```python
@setup
def mytask():
    print("I am a setup task")

with dag_maker() as dag:
    mytask.override(task_id='newtask')

assert len(dag.task_group.children) == 1
setup_task = dag.task_group.children["newtask"]
assert setup_task._is_setup
```
and teardown also works
"sla",
        "execution_timeout",
        "on_execute_callback",
        "on_failure_callback",
        "on_success_callback",
        "on_retry_callback",
        "do_xcom_push",
    }
    
    supports_lineage = False
    
    __instantiated = False
    
    
    __init_kwargs: dict[str, Any]
    
    _lock_for_execution = False
    _dag: DAG | None = None
    task_group: TaskGroup | None = None
    
    
    subdag: DAG | None = None
    start_date: pendulum.DateTime | None = None
    end_date: pendulum.DateTime | None = None
    
    __from_mapped = False
    _is_setup = False
    _is_teardown = False
    _on_failure_fail_dagrun = False
    def __init__(