>>>
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',
);