code: func EncodeToValues(dst interface{}) (url.Values, error) {
  	v := reflect.ValueOf(dst)
  	n, err := encodeToNode(v, false)
  	if err != nil {
  		return nil, err
  	}
  	vs := n.values(defaultDelimiter, defaultEscape)
  	return vs, nil
  }
docs: // EncodeToValues encodes dst as a form and returns it as Values.