def METHOD_NAME(config):
    """
    Check the context for the notifier and construct it if not present
    """
    if "watchdog.observer" not in __context__:
        queue = collections.deque()
        observer = Observer()
        for path in config.get("directories", {}):
            path_params = config.get("directories").get(path)
            masks = path_params.get("mask", DEFAULT_MASK)
            event_handler = Handler(queue, masks)
            observer.schedule(event_handler, path)
        observer.start()
        __context__["watchdog.observer"] = observer
        __context__["watchdog.queue"] = queue
    return __context__["watchdog.queue"]