code: func (s *ChangesService) ListFiles(changeID, revisionID string, opt *FilesOptions) (map[string]FileInfo, *Response, error) {
  	u := fmt.Sprintf("changes/%s/revisions/%s/files/", changeID, revisionID)
  
  	u, err := addOptions(u, opt)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	req, err := s.client.NewRequest("GET", u, nil)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	var v map[string]FileInfo
  	resp, err := s.client.Do(req, &v)
  	if err != nil {
  		return nil, resp, err
  	}
  
  	return v, resp, err
  }
docs: // ListFiles lists the files that were modified, added or deleted in a revision.
  // As result a map is returned that maps the file path to a list of FileInfo entries.
  // The entries in the map are sorted by file path.
  //
  // Gerrit API docs: https://gerrit-review.googlesource.com/Documentation/rest-api-changes.html#list-files