FormTestGroupVerticalTabsForm.php in Zircon Profile 8        
                          
                  
                        
  
  
  
File
  core/modules/system/tests/modules/form_test/src/Form/FormTestGroupVerticalTabsForm.php
  
    View source  
  <?php
namespace Drupal\form_test\Form;
use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;
class FormTestGroupVerticalTabsForm extends FormBase {
  
  public function getFormId() {
    return 'form_test_group_vertical_tabs';
  }
  
  public function buildForm(array $form, FormStateInterface $form_state) {
    $form['vertical_tabs'] = array(
      '#type' => 'vertical_tabs',
    );
    $form['meta'] = array(
      '#type' => 'details',
      '#title' => 'First group element',
      '#group' => 'vertical_tabs',
    );
    $form['meta']['element'] = array(
      '#type' => 'textfield',
      '#title' => 'First nested element in details element',
    );
    $form['meta_2'] = array(
      '#type' => 'details',
      '#title' => 'Second group element',
      '#group' => 'vertical_tabs',
    );
    $form['meta_2']['element_2'] = array(
      '#type' => 'textfield',
      '#title' => 'Second nested element in details element',
    );
    return $form;
  }
  
  public function submitForm(array &$form, FormStateInterface $form_state) {
  }
}