Class SiblingNodeIterator

src/com/google/javascript/rhino/Node.java:1912–1938

@see Node#children()

   * @see Node#children()
   */
  private static final class SiblingNodeIterator implements Iterator<Node> {
    private @Nullable Node current;

    SiblingNodeIterator(Node start) {
      this.current = start;
    }

    @Override
    public boolean hasNext() {
      return current != null;
    }

    @Override
    public Node next() {
      if (current == null) {
        throw new NoSuchElementException();
      }
      Node n = current;
      current = current.getNext();
      return n;
    }

    @Override
    public void remove() {
      throw new UnsupportedOperationException();
    }
  }

  // ==========================================================================
  // Accessors