docs: public void saveLastResponse(DialogResponse<T> response) {
          if (saveResponseId != null && (response == null || !response.isExcluded())) {
              int index = response == null ? -1 : responses.indexOf(response);
              PropertyUtil.saveValue(SAVED_RESPONSE_PROP_NAME, saveResponseId, false,
                  index < 0 ? null : Integer.toString(index));
          }
      }