double-field-accordion.html.twig in Double Field 8.3

<div class="double-field-accordion">
{% for item in items %}
  <h3>
    <a href="#">
      {% if settings.first.prefix %}
        <span class="double-field-prefix">{{ settings.first.prefix }}</span>
      {% endif %}
      {{ item.first }}
      {% if settings.first.suffix %}
        <span class="double-field-suffix">{{ settings.first.suffix }}</span>
      {% endif %}
    </a>
  </h3>
  <div>
    {% if settings.second.prefix %}
      <span class="double-field-prefix">{{ settings.second.prefix }}</span>
    {% endif %}
    {{ item.second }}
    {% if settings.second.suffix %}
      <span class="double-field-suffix">{{ settings.second.suffix }}</span>
    {% endif %}
  </div>
{% endfor %}
</div>