def reset(self, **kwargs):
        self.release_all_balls()
        self.balls_locked = 0
Create the heartbeat monitor thread.
dataset/ETHPy150Open missionpinball/mpf/mpf/devices/ball_lock.py/BallLock.reset--crossover with--dataset/ETHPy150Open jupyter/jupyter_client/jupyter_client/channels.py/HBChannel.__init__