code: func buildTagSet(name string) map[string]string {
  	labelMap := map[string]string{}
  	tags := strings.Split(name, ";")
  	labelMap["__name__"] = tags[0]
  	for _, lbl := range tags[1:] {
  		kv := strings.Split(lbl, "=")
  		labelMap[kv[0]] = kv[1]
  	}
  	return labelMap
  }
docs: // Turns graphite target name into prometheus graphite name
  // TODO models.Series should provide a map of tags but the one returned from getTargets doesn't