Как управлять полями формы комментариев в Drupal 8

function sizin_form_comment_form_alter(&$form, &$form_state)
{
$form['author']['name']['#attributes']['placeholder'] = t( 'Name' );
$form['author']['name']['#title']= FALSE; //Subject $form['your_comment']['subject'] = $form['subject'];
$form['your_comment']['subject']['#title'] = FALSE;
$form['your_comment']['subject']['#attributes'] = array('placeholder' => t('title'));
unset($form['subject']);
$form['your_comment']['subject']['#weight'] = -10; //Comment
$form['your_comment']['comment_body'] = $form['comment_body'];
$form['your_comment']['comment_body'][LANGUAGE_NONE][0]['value']['#attributes'] = array('placeholder' => t('comment')); unset($form['comment_body']);
}

function sizin_form_comment_form_alter(&$form, &$form_state)
{

$form['author']['name']['#attributes']['placeholder'] = t( 'Name' );
$form['author']['name']['#title']= FALSE; //Subject $form['your_comment']['subject'] = $form['subject'];
$form['your_comment']['subject']['#title'] = FALSE;
$form['your_comment']['subject']['#attributes'] = array('placeholder' => t('title'));
unset($form['subject']);
$form['your_comment']['subject']['#weight'] = -10; //Comment
$form['your_comment']['comment_body'] = $form['comment_body'];
$form['your_comment']['comment_body'][LANGUAGE_NONE][0]['value']['#attributes'] = array('placeholder' => t('comment')); unset($form['comment_body']);

}

function ws_form_alter(&$form, FormStateInterface $form_state, $form_id)
{
    if ($form_id == 'user_login_form' ) 
    {
    // Add placeholders.
        $form['name']['#attributes']['placeholder'] = t('Имя пользователя...');
        $form['pass']['#attributes']['placeholder'] = t('Пароль...');
        $form['#attributes']['class'][] = "login-form";
        $form['actions']['submit']['#attributes']['class'][] = "btn";
        $form['name']['#attributes']['class'][] = "form-control";
        $form['pass']['#attributes']['class'][] = "form-control";
           $form['name']['#title'] = 'Введите имя';
        $form['pass']['#title'] = 'Введите пароль';
        unset($form['name']['#description']);
        unset($form['pass']['#description']);
   //     $form['name']['#prefix'] = '<div class="form-group">';
   //     $form['name']['#suffix'] = '</div>';
      }

}

function ss2_form_alter(&$form, FormStateInterface $form_state, $form_id)
{
    if ($form_id == 'search_block_form' ) 
    {
        $form['actions']['submit']['#attributes']['class'][] = "search-form_submit"; 
        $form['actions']['submit']['#attributes']['class'][] = "fa-search";
        $form['actions']['submit']['#value'] = "";
        $form['keys']['#attributes']['class'][] = "search-form_input";
    }
    if ($form_id == 'contact_message_hotite_takoi_ze__form' ) 
    {
        $form['actions']['preview']['#access'] = FALSE;
        $form['#attributes']['class'][] = "contact-form";
        $form['actions']['submit']['#attributes']['class'][] = "btn";
        $form['actions']['submit']['#attributes']['class'][] = "btn-primary";
            $form['actions']['submit']['#value'] = "отправить заявку";
    }
    if ($form_id == 'comment_comment_form' ) 
    {
        $form['#attributes']['class'][] = "contact-form";
        $form['actions']['submit']['#attributes']['class'][] = "btn";
        $form['actions']['submit']['#attributes']['class'][] = "btn-primary";
        $form['actions']['submit']['#value'] = "отправить комментарий";
        $form['author']['name']['#attributes']['placeholder'] = 'Ваше имя';
        $form['author']['name']['#title']= FALSE;
    }
}