def print_status(self):
        """Provide a snapshot of the current status."""
        s = []
        s.append('=== State Machines: ===\n')
        for stm_id in Driver._stms_by_id:
            stm = Driver._stms_by_id[stm_id]
            s.append('    - {} in state {}\n'.format(stm.id, stm.state))
        s.append('=== Events in Queue: ===\n')
        for event in self._event_queue.queue:
            if event is not None:
                s.append('    - {} for {} with args:{} kwargs:{}\n'.format(
                    event['id'], event['stm'].id,
                    event['args'], event['kwargs']))
        s.append('=== Active Timers: {} ===\n'.format(len(self._timer_queue)))
        for timer in self._timer_queue:
            s.append('    - {} for {} with timeout {}\n'.format(
                timer['id'], timer['stm'].id, timer['timeout']))
        s.append('=== ================ ===\n')
        return ''.join(s)
Provide a snapshot of the current status.