getDeletionMessage example

    return $form;
  }

  /** * {@inheritdoc} */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
    $entity = $this->getEntity();
    $message = $this->getDeletionMessage();

    // Make sure that deleting a translation does not delete the whole entity.     if (!$entity->isDefaultTranslation()) {
      $untranslated_entity = $entity->getUntranslated();
      $untranslated_entity->removeTranslation($entity->language()->getId());
      $untranslated_entity->save();
      $form_state->setRedirectUrl($untranslated_entity->toUrl('canonical'));
    }
    else {
      $entity->delete();
      $form_state->setRedirectUrl($this->getRedirectUrl());
    }

$this->logger($entity->getEntityType()->getProvider())->info('The @entity-type %label has been deleted.', [
      '@entity-type' => $entity->getEntityType()->getSingularLabel(),
      '%label' => $entity->label(),
    ]);
  }

  /** * {@inheritdoc} */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $this->getEntity()->delete();
    $this->messenger()->addStatus($this->getDeletionMessage());
    $form_state->setRedirectUrl($this->getCancelUrl());
    $this->logDeletionMessage();
  }

}