code: func (r RoleMap) String() string {
  	values, err := r.parse()
  	if err != nil {
  		return fmt.Sprintf("<failed to parse: %v", err)
  	}
  	if len(values) != 0 {
  		return fmt.Sprintf("%v", values)
  	}
  	return "<empty>"
  }
docs: // String prints user friendly representation of role mapping