{% with id=widget.attrs.id %}
    <ul{% if id %} id="{{ id }}"{% endif %}{% if widget.attrs.class %} class="{{ widget.attrs.class }}"{% endif %}>
        {% for group, options, index in widget.optgroups %}
            {% if group %}
                <li>{{ group }}
                <ul{% if id %} id="{{ id }}_{{ index }}"{% endif %}>
            {% endif %}
            {% for option in options %}
            <li data-imageid="{{option.value}}" data-loopcounter="{{forloop.parentloop.counter}}">{% include option.template_name with widget=option %}</li>
            {% endfor %}
            {% if group %}
                </ul>
                </li>
            {% endif %}
        {% endfor %}
    </ul>
{% endwith %}