Updated Drupal to 8.6. This goes with the following updates because it's possible...

[yaffs-website] / vendor / chi-teck / drupal-code-generator / templates / d7 / hook / system_theme_engine_info.twig

/**
 * Implements hook_system_theme_engine_info().
 */
function {{ machine_name }}_system_theme_engine_info() {
  $theme_engines['izumi'] = drupal_get_path('module', 'mymodule') . '/izumi/izumi.engine';
  return $theme_engines;
}