def __init__()

in later/task.py [0:0]


    def __init__(self, *, cancel_timeout: float = 300, context: bool = False) -> None:
        """
        cancel_timeout is the time in seconds we will wait after cancelling all
        the tasks watched by this watcher.

        context is wether to expose this Watcher via contextvars now or at __aenter__
        """
        if context:
            WATCHER_CONTEXT.set(self)
        self._cancel_timeout = cancel_timeout
        self._tasks = {}
        self._scheduled = []
        self._tasks_changed = BiDirectionalEvent()
        self._cancelled = asyncio.Event()
        self._preexit_callbacks = []
        self._shielded_tasks = {}
        self.running = False