Fluid

<ul>
    <f:for each="{departements}" as="departement">
        <li>
            {departement.title}
            <f:if condition="{departement.employes}"
                <ul>
                    <f:for each="{departement.employes}" as="employe">
                        <li>{employe.title}</li>
                    </f:for>
                </ul>
            </f:if>
        </li>
    </f:for>
</ul>