code: def Wait(self):
      
      time.sleep(self.sleep_time - int(self.sleep_time))
  
      # Split a long sleep interval into 1 second intervals so we can heartbeat.
      for _ in range(int(self.sleep_time)):
        time.sleep(1)
  
      # Back off slowly at first and fast if no answer.
      self.sleep_time = min(self.poll_max,
                            max(self.poll_min, self.sleep_time) * self.poll_slew)
docs: Wait until the next action is needed.