parent.insertBefore(element, firstChild)
        }
    }

    public static void addBefore(Node sibling, Closure cl) {
        DomBuilder builder = new DomBuilder(sibling.ownerDocument, null)
        cl.delegate = builder
        cl.call()
        def parent = sibling.parentNode
        builder.elements.each { element ->
            parent.insertBefore(element, sibling)
        }
    }