public function buildSummary(array $orders = []) {
    if (empty($orders)) {
      return [
        '#markup' => $this->t('You have no orders'),
      ];
    }

    $build = [];

    foreach ($orders as $order) {
      $build[] = [
        '#theme' => 'user_order',
        '#order' => $order,
        '#order_details_path' => Url::fromRoute('acm_customer.view_page', [
          'page' => $this->getPageId(),
          'action' => 'edit',
          'id' => $order['order_id'],
        ])->toString(),
      ];
    }

    return $build;
  }