>>>
final confirmationFuture = _dialogService.showConfirmationDialog(
    'Lorem ipsum dolor sit amet, consectetur adipiscing elit',
    new DialogSettings()
  ..primaryButton = DialogSettings.BUTTON_CANCEL
  ..okButtonText = 'OK'
  ..cancelButtonText = 'Kittens');
<<<
final confirmationFuture = _dialogService.showConfirmationDialog(
    'Lorem ipsum dolor sit amet, consectetur adipiscing elit',
    new DialogSettings()
      ..primaryButton = DialogSettings.BUTTON_CANCEL
      ..okButtonText = 'OK'
      ..cancelButtonText = 'Kittens');