Drupal 8 - Afficher une liste à puce avec des classes CSS

    $items = [];

    $items[] = [
      '#markup' => t('Mon item 1'),
      '#wrapper_attributes' => [
        'class' => [
          'class-css-item-1'
        ]
      ]
    ];

    $items[] = [
      '#markup' => t('Mon item 2'),
      '#wrapper_attributes' => [
        'class' => [
          'class-css-item-2'
        ]
      ]
    ];

    $build = [
      '#theme' => 'item_list',
      '#items' => $items,
      '#list_type' => 'ul',
    ];
    return $build;