code: def maybe_pause(self, timeout=None):
      
      deadline = time.time() + timeout if timeout else None
      with self._lock:
        while self._state != self._PAUSING:
          # If we've been terminated, or the deadline has passed, return.
          timeout = deadline - time.time() if deadline else None
          if self._state == self._TERMINATING or not timeout or timeout <= 0:
            return
          # Otherwise, wait for the state to change.
          self._condition.wait(timeout=timeout)
  
        # Set Paused, and then wait until we are no longer Paused.
        self._set_state(self._PAUSED, self._PAUSING)
        while self._state == self._PAUSED:
          self._condition.wait()
docs: Called by the service to indicate that it is pausable.
  
      If the service calls this method while the state is `Pausing`, the state will transition
      to `Paused`, and the service will block here until it is marked `Running` or `Terminating`.
  
      If the state is not currently `Pausing`, and a timeout is not passed, this method returns
      immediately. If a timeout is passed, this method blocks up to that number of seconds to wait
      to transition to `Pausing`.