code: func (opts *Options) valuesMap(m map[string]interface{}) (map[string]interface{}, error) {
  	for _, skv := range opts.Values {
  		if err := strvals.ParseInto(skv, m); err != nil {
  			return nil, err
  		}
  	}
  	return m, nil
  }
docs: // valuesMap returns user set values in map format