code: func Equal(ls, o Labels) bool {
  	if len(ls) != len(o) {
  		return false
  	}
  	for i, l := range ls {
  		if l.Name != o[i].Name || l.Value != o[i].Value {
  			return false
  		}
  	}
  	return true
  }
docs: // Equal returns whether the two label sets are equal.