<select name="{{ widget.name }}" {% include "django/forms/widgets/class_attr.html" with default="vSelect custom-select" %}{% include "django/forms/widgets/attrs.html" %}>
  {% for group_name, group_choices, group_index in widget.optgroups %}
    {% if group_name %}
      <optgroup label="{{ group_name }}">
    {% endif %}

    {% for option in group_choices %}
      {% with widget=option %}
        {% include option.template_name %}
      {% endwith %}
    {% endfor %}

    {% if group_name %}
      </optgroup>
    {% endif %}
  {% endfor %}
</select>
