code: func (s *ChangesService) AbandonChange(changeID string, input *AbandonInput) (*ChangeInfo, *Response, error) {
  	return s.change("abandon", changeID, input)
  }
docs: // AbandonChange abandons a change.
  //
  // The request body does not need to include a AbandonInput entity if no review
  // comment is added.
  //
  // Gerrit API docs: https://gerrit-review.googlesource.com/Documentation/rest-api-changes.html#abandon-change