Node child = findFirstChildNamed(root, name);
        if (child == null) {
            child = root.appendNode(name);
        }
        return child;
    }

    public static Node findOrCreateFirstChildWithAttributeValue(@Nullable Node root, String childName, String attribute, String value) {
        Node child = findFirstChildWithAttributeValue(root, childName, attribute, value);
        if (child == null) {