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
from airflow.exceptions import AirflowException
from airflow.models.abstractoperator import DEFAULT_RETRIES, DEFAULT_RETRY_DELAY
from airflow.models.baseoperator import (
    BaseOperator,
    coerce_resources,
    coerce_timedelta,
    get_merged_defaults,
    parse_retries,
)
from airflow.models.dag import DAG, DagContext
from airflow.models.expandinput import (
    EXPAND_INPUT_EMPTY,
    DictOfListsExpandInput,
    ExpandInput,
    ListOfDictsExpandInput,
    OperatorExpandArgument,
    OperatorExpandKwargsArgument,
    is_mappable,
)
from airflow.models.mappedoperator import MappedOperator, ValidationSource, ensure_xcomarg_return_value
from airflow.models.pool import Pool
from airflow.models.xcom_arg import XComArg
from airflow.typing_compat import ParamSpec, Protocol
from airflow.utils import timezone
from airflow.utils.context import KNOWN_CONTEXT_KEYS, Context
from airflow.utils.decorators import remove_task_decorator
from airflow.utils.helpers import prevent_duplicates
from airflow.utils.task_group import TaskGroup, TaskGroupContext
from airflow.utils.types import NOTSET
class ExpandableFactory(Protocol):