{# templates/admin/field/sous_modules.html.twig #}
{% if field.value|length > 0 %}
    <span class="badge badge-secondary">{{ field.value|length }} sous-module(s)</span>
    <ul class="list-unstyled">
        {% for sousModule in field.value %}
            <li>{{ sousModule.titre }}</li>
        {% endfor %}
    </ul>
{% else %}
    <span class="badge badge-secondary">Aucun sous-module</span>
{% endif %}