}

    def formatTree(Closure cl) {
        withCategories {
            return formatTree(cl.call())
        }
    }

    def withCategories(Closure cl) {
        use(BuildableDOMCategory) {
            return cl.call()
        }
    }

    def format(Node... nodes) {
        format(nodes as List)
    }

    def formatTree(Node... nodes) {
        formatTree(nodes as List)