entity_change_notifier-8.x-1.0/src/Form/PublisherDeleteForm.php

<?php

namespace Drupal\entity_change_notifier\Form;

use Drupal\Core\Entity\EntityDeleteForm;
use Drupal\Core\Form\FormStateInterface;

/**
 * Builds the form to delete Publisher entities.
 */
class PublisherDeleteForm extends EntityDeleteForm {

  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'ecn_publisher_delete_form';
  }

  /**
   * {@inheritdoc}
   */
  public function getQuestion() {
    return $this->t('Are you sure you want to delete %name?', ['%name' => $this->entity->label()]);
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $this->entity->delete();

    drupal_set_message(
      $this->t('The @type %label has been deleted.',
        [
          '@type' => $this->entity->getEntityType()->getLabel(),
          '%label' => $this->entity->label(),
        ]
      )
    );

    $form_state->setRedirectUrl($this->getCancelUrl());
  }

}