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

[yaffs-website] / vendor / chi-teck / drupal-code-generator / templates / d8 / template-template.twig

{{ '{#' }}
/**
 * @file
 * Default theme implementation to display something.
 *
 * Available variables:
 * - foo: Foo variable description.
{% if create_preprocess %}
 *
 * @see template_preprocess_{{ template_name|h2u }}()
{% endif %}
 *
 * @ingroup themeable
 */
{{ '#}' }}
<div class="wrapper-class">
  {{ '{{' }} foo {{ '}}' }}
</div>