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<?php

namespace Drupal\form_test\Form;

use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;

/**
 * Form constructor to test the #required property without #title.
 *
 * @internal
 */
class FormTestValidateRequiredNoTitleForm extends FormBase {

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

  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) {
    $form['textfield'] = [
      '#type' => 'textfield',
      '#required' => TRUE,
    ];
    $form['actions'] = ['#type' => 'actions'];
    $form['actions']['submit'] = ['#type' => 'submit', '#value' => 'Submit'];
    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    drupal_set_message('The form_test_validate_required_form_no_title form was submitted successfully.');
  }

}