code: func (c *syncClient) Lastsave() (result int64, err Error) {
  	var resp Response
  	resp, err = c.conn.ServiceRequest(&LASTSAVE, [][]byte{})
  	if err == nil {
  		result = resp.GetNumberValue()
  	}
  	return result, err
  
  }
docs: // Redis LASTSAVE command.