/**
 * Implements hook_views_query_substitutions().
 */
function {{ machine_name }}_views_query_substitutions(ViewExecutable $view) {
  // Example from views_views_query_substitutions().
  return [
    '***CURRENT_VERSION***' => \Drupal::VERSION,
    '***CURRENT_TIME***' => REQUEST_TIME,
    '***LANGUAGE_language_content***' => \Drupal::languageManager()->getCurrentLanguage(LanguageInterface::TYPE_CONTENT)->getId(),
    PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT => \Drupal::languageManager()->getDefaultLanguage()->getId(),
  ];
}