file_transfer-8.x-2.0-beta2/src/Form/FileTransferDeleteForm.php

<?php
namespace Drupal\file_transfer\Form;

use Drupal\Core\Entity\EntityConfirmFormBase;
use Drupal\Core\Url;
use Drupal\Core\Form\FormStateInterface;

/**
 * Builds the form to delete an filetransfer.
 */

class FileTransferDeleteForm extends EntityConfirmFormBase {

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

  /**
   * {@inheritdoc}
   */
  public function getCancelUrl() {
    return new Url('entity.filetransfer.collection');
  }

  /**
   * {@inheritdoc}
   */
  public function getConfirmText() {
    return $this->t('Delete');
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    
    $t_args = ['%label' => $this->entity->label()];
	$this->entity->delete();
	drupal_set_message(t('The %label filetransfer has been deleted.', $t_args));

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