}

    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) {

    Document document
    Node parent
    List elements = []

    def DomBuilder(Document document) {
        this.document = document
        this.parent = document
    }

    def DomBuilder(Node parent) {
        this.document = parent.ownerDocument
        this.parent = parent
    }

    def DomBuilder(Document document, Node parent) {
        this.document = document

            return
        }

        // The correct state we are looking for is:
        // 1. It's a merge commit.
        // 2. One of its parent commits is from master only.
        // 3. Another parent commit is from master and release branch.
        // Otherwise, skip this commit.
        List<String> p1Branches = branchesOf(parentCommits[0])