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
raw_source = inspect.getsource(self.python_callable)
        res = dedent(raw_source)
        res = remove_task_decorator(res, self.custom_operator_name)
        return res
FParams = ParamSpec("FParams")
FReturn = TypeVar("FReturn")
OperatorSubclass = TypeVar("OperatorSubclass", bound="BaseOperator")
@attr.define(slots=False)
class _TaskDecorator(ExpandableFactory, Generic[FParams, FReturn, OperatorSubclass]):
    """
    Helper class for providing dynamic task mapping to decorated functions.
    ``task_decorator_factory`` returns an instance of this, instead of just a plain wrapped function.
    :meta private:
    """
    function: Callable[FParams, FReturn] = attr.ib(validator=attr.validators.is_callable())
    operator_class: type[OperatorSubclass]
    multiple_outputs: bool = attr.ib()
    kwargs: dict[str, Any] = attr.ib(factory=dict)
    decorator_name: str = attr.ib(repr=False, default="task")
    _airflow_is_task_decorator: ClassVar[bool] = True
    @multiple_outputs.default
    def _infer_multiple_outputs(self):