Call after a close/re-connect.

        Automatically re-establishes the USE and WATCH configs previously setup.

def _re_establish_use_watch(self):
        """Call after a close/re-connect.

        Automatically re-establishes the USE and WATCH configs previously setup.
        """
        if self.current_tube != self.desired_tube:
            self.use(self.desired_tube)
        if self._watchlist != self.desired_watchlist:
            self.watchlist = self.desired_watchlist