def schedule_advance_slots(self, slots: Dict[str, Dict[str, int]]) -> Tuple[bool, List[str]]:
        """Wrapper to ensure slots advance daemon thread is started if not already.

        :param slots: dictionary containing slot information.

        :return: tuple with the result of the scheduling of slot advancement: ``failed`` and list of slots to copy.
        """
        if not self._advance:
            self._advance = SlotsAdvanceThread(self)
        return self._advance.schedule(slots)
Wrapper to ensure slots advance daemon thread is started if not already.

        :param slots: dictionary containing slot information.

        :return: tuple with the result of the scheduling of slot advancement: ``failed`` and list of slots to copy.
        
patroni/postgresql/slots.py