Method getChildBefore

rhino/src/main/java/org/mozilla/javascript/Node.java:214–222

(Node child)

    }

    public Node getChildBefore(Node child) {
        if (child == first) return null;
        Node n = first;
        while (n.next != child) {
            n = n.next;
            if (n == null) throw new RuntimeException("node is not a child");
        }
        return n;
    }

    public Node getLastSibling() {
        Node n = this;