code: func (s *ChangesService) ListChangeDrafts(changeID string) (*map[string][]CommentInfo, *Response, error) {
  	u := fmt.Sprintf("changes/%s/drafts", changeID)
  	return s.getCommentInfoMapResponse(u)
  }
docs: // ListChangeDrafts lLists the draft comments of all revisions of the change that belong to the calling user.
  // The entries in the map are sorted by file path, and the comments for each path are sorted by patch set number.
  // Each comment has the patch_set field set, and no author.
  //
  // Gerrit API docs: https://gerrit-review.googlesource.com/Documentation/rest-api-changes.html#list-change-drafts