code: func (api *PublicWhisperAPI) Info(ctx context.Context) Info {
  	stats := api.w.Stats()
  	return Info{
  		Memory:         stats.memoryUsed,
  		Messages:       len(api.w.messageQueue) + len(api.w.p2pMsgQueue),
  		MinPow:         api.w.MinPow(),
  		MaxMessageSize: api.w.MaxMessageSize(),
  	}
  }
docs: // Info returns diagnostic information about the whisper node.