"template_searchpath",
        "last_loaded",
    }
    __serialized_fields: frozenset[str] | None = None
    fileloc: str
    """
    File path that needs to be imported to load this DAG or subdag.
    This may not be an actual file on disk in the case when this DAG is loaded
    from a ZIP file or other DAG distribution format.
    """
    parent_dag: DAG | None = None  
    
    
    def __init__(
        self,
        dag_id: str,
        description: str | None = None,
        schedule: ScheduleArg = NOTSET,
        schedule_interval: ScheduleIntervalArg = NOTSET,
        timetable: Timetable | None = None,
        start_date: datetime | None = None,
        end_date: datetime | None = None,
        full_filepath: str | None = None,
        template_searchpath: str | Iterable[str] | None = None,
        template_undefined: type[jinja2.StrictUndefined] = jinja2.StrictUndefined,
        user_defined_macros: dict | None = None,
        user_defined_filters: dict | None = None,
        default_args: dict | None = None,
        concurrency: int | None = None,
        max_active_tasks: int = conf.getint("core", "max_active_tasks_per_dag"),