TestActionConfirmForm.php

<?php

namespace Drupal\action_bulk_test\Form;

use Drupal\Component\Render\MarkupInterface;
use Drupal\Core\Form\ConfirmFormBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Url;

/**
 * Confirmation form for 'test_action' action.
 */
class TestActionConfirmForm extends ConfirmFormBase {
    
    /**
     * {@inheritdoc}
     */
    public function getFormId() : string {
        return 'test_action_confirm_form';
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCancelUrl() : Url {
        return Url::fromRoute('<front>');
    }
    
    /**
     * {@inheritdoc}
     */
    public function getQuestion() : MarkupInterface {
        return $this->t('Do you agree?');
    }
    
    /**
     * {@inheritdoc}
     */
    public function submitForm(array &$form, FormStateInterface $form_state) : void {
    }

}