utilisation d'un macro pour une fonction récursive dans Twig

tree.html.twig

{% import _self as brandOrder %}

{% extends 'TheodoDemoBundle::base.html.twig' %}


{% macro brandOrder(brand) %}
    <li class="nav level{{ brand.treeLevel }} more">
        <div id="brand{{ brand.id }}"><span>{{ brand.title }}</span></div>
        {% if brand.children|length > 0 %}
            {% import _self as brandHelper %}
            <ul>
                {% for brandChildren in brand.childrenOrdered %}
                    {{ brandHelper.brandOrder(brandChildren) }}
                {% endfor %}
            </ul>
        {% endif %}
    </li>
{% endmacro %}

{% block content %}
    <div class="span6 right">
        <h3>Les marques</h3>

        <ul id="brand-list" class="brand nav nav-pills nav-stacked">
           {% for brand in brands %}
               {{ brandOrder.brandOrder(brand) }}
           {% endfor %}
        </ul>
    </div>
{% endblock %}