code: func (s *ServerV2) LabelsString() string {
  	labels := []string{}
  	for key, val := range s.Metadata.Labels {
  		labels = append(labels, fmt.Sprintf("%s=%s", key, val))
  	}
  	for key, val := range s.Spec.CmdLabels {
  		labels = append(labels, fmt.Sprintf("%s=%s", key, val.Result))
  	}
  	sort.Strings(labels)
  	return strings.Join(labels, ",")
  }
docs: // LabelsString returns a comma separated string with all node's labels