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
"""Collects DAGs to test."""
    dags = {}
    dags.update(make_simple_dag())
    dags.update(make_user_defined_macro_filter_dag())
    if dag_folder:
        if isinstance(dag_folder, (list, tuple)):
            patterns = dag_folder
        else:
            patterns = [dag_folder]
    else:
        patterns = [
            "airflow/example_dags",
            "airflow/providers/*/example_dags",  
            "airflow/providers/*/*/example_dags",  
            "tests/system/providers/*/",
            "tests/system/providers/*/*/",
        ]
    for pattern in patterns:
        for directory in glob(f"{ROOT_FOLDER}/{pattern}"):
            dags.update(make_example_dags(directory))
    
    dags = {dag_id: dag for dag_id, dag in dags.items() if not dag.is_subdag}
    return dags
def get_timetable_based_simple_dag(timetable):