<f:section name="Items">
	<f:spaceless>
		<f:for each="{items}" as="item">
			Item: {item.id}.
			<f:if condition="{item.items}">
				<f:render section="Items" arguments="{items: item.items}" />
			</f:if>
		</f:for>
	</f:spaceless>
</f:section>

<f:render section="Items" arguments="{items: items}" />