* {@inheritdoc}
*/
public function submitForm(array &$form, FormStateInterface $form_state) {
- drupal_set_message($this->t('The ConfirmFormTestForm::submitForm() method was used for this form.'));
+ $this->messenger()->addStatus($this->t('The ConfirmFormTestForm::submitForm() method was used for this form.'));
$form_state->setRedirect('<front>');
}