public function generateSummaryActivitiesCsv($node) {
    $summary = $this->getSummary($node);

    $header = [
      $this->t('Category'),
      $this->t('Subcategory'),
      $this->t('Category Amount'),
      $this->t('Subcategory Amount'),
    ];

    $records = [];

    foreach ($summary['activities']['categories'] as $activity) {
      /** @var \Drupal\taxonomy\Entity\Term $term */
      $term = $activity['term'];

      $records[] = [$term->getName(), '', $activity['amount'], ''];

      foreach ($activity['subcategories'] as $subcategory) {
        /** @var \Drupal\taxonomy\Entity\Term $subTerm */
        $subTerm = $subcategory['term'];

        $records[] = ['', $subTerm->getName(), '', $subcategory['amount']];
      }
    }

    $records[] = ['', '', '', ''];
    $records[] = [$this->t('Total'), '', '', $summary['activities']['totalActivities']];

    $fileName = 'summary_activities_' . date('Y-m-d') . '.csv';

    return $this->createCsvResponse($fileName, $header, $records);
  }