{%- block head -%}
    <thead>
        <tr>
            {% for head in list.head %}
                {{ block("head_cell") }}
            {% endfor %}
        </tr>
    </thead>
{% endblock %}

{%- block head_cell -%}
    <th class="{{head.size}} {{head.align}}">{{ renderheadcell(list, head, list.head) }}</th>
{%- endblock -%}