/**
 * Implements hook_views_post_execute().
 */
function {{ machine_name }}_views_post_execute(ViewExecutable $view) {
  // If there are more than 100 results, show a message that encourages the user
  // to change the filter settings.
  // (This action could be performed later in the execution process, but not
  // earlier.)
  if ($view->total_rows > 100) {
    \Drupal::messenger()->addStatus(t('You have more than 100 hits. Use the filter settings to narrow down your list.'));
  }
}