}

    public static def leftShift(Node parent, Closure cl) {
        DomBuilder builder = new DomBuilder(parent)
        cl.delegate = builder
        cl.call()
        return builder.elements[0]
    }

    public static void leftShift(Node parent, Node node) {
        parent.appendChild(parent.ownerDocument.importNode(node, true))
    }

    public static void addFirst(Node parent, Closure cl) {

        return "attribute[key: $key, value: $valueCell.textContent]"
    }

    String getKey() {
        return titleCell.textContent
    }

    List<Node> getTitle() {
        return titleCell.childNodes.collect { it }
    }

    List<Node> getValue() {
        return valueCell.childNodes.collect { it }
    }

            return cl.call()
        }
    }

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

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

    def formatTree(Iterable<? extends Node> nodes) {
        format(nodes, true)
    }

    def format(Iterable<? extends Node> nodes, boolean prettyPrint = false) {
        StringBuilder builder = new StringBuilder()

    }

    def appendChild(Node node) {
        if (!current) {
            elements << (Element) document.importNode(node, true)
        } else  {
            current.appendChild(document.importNode(node, true))
        }
    }

    def appendChildren(Iterable<? extends Node> nodes) {
        nodes.each { appendChild(it) }
    }

    def appendChildren(NodeList nodes) {
        nodes.each { appendChild(it) }

import javax.xml.transform.stream.StreamResult
import org.w3c.dom.Document
import org.w3c.dom.Element
import org.w3c.dom.Node

class XIncludeAwareXmlProvider {

    Document root

    Element parse(File sourceFile) {
        root = parseSourceFile(sourceFile)
        root.documentElement
    }

    Node emptyDoc() {
        root = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument()
    }