code: func OptionLabels(labels []string) Option {
  	return func(c *Config) {
  		for _, label := range labels {
  			if strings.HasPrefix(label, netlabel.Prefix) {
  				c.Daemon.Labels = append(c.Daemon.Labels, label)
  			}
  		}
  	}
  }
docs: // OptionLabels function returns an option setter for labels