code: func (a *AliasRemoveIndexAction) Source() (interface{}, error) {
  	if err := a.Validate(); err != nil {
  		return nil, err
  	}
  	src := make(map[string]interface{})
  	act := make(map[string]interface{})
  	src["remove_index"] = act
  	act["index"] = a.index
  	return src, nil
  }
docs: // Source returns the JSON-serializable data.