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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def reset(self):
 """ Reset the monitor. Reset the aliveness timeouts. Clear the stale state. Cancel and stop pinging. Call `on_fresh` if the stale state was set. """

        self._monitor.notify_received()
        self._pinger.stop()
        self._mark_fresh()