code: def _start_new_timer(self):
          
          if not self._running.is_set():
              return False
          self._timer = self.timer_impl(
              interval=self._interval,
              function=self._check_for_life_signs
          )
          self._timer.daemon = True
          self._timer.start()
          return True
docs: Create a timer that will be used to periodically check the
          connection for heartbeats.
  
          :return: