public static <T> com.google.common.graph.ElementOrder<T> unwrapOrder(ElementOrder<T> order) {
    switch (order.type()) {
      case STABLE:
        return com.google.common.graph.ElementOrder.stable();
      case INSERTION:
        return com.google.common.graph.ElementOrder.insertion();
      case SORTED:
        return com.google.common.graph.ElementOrder.sorted(order.comparator());
      case UNORDERED:
      default:
        return com.google.common.graph.ElementOrder.unordered();
    }
  }
public static <T> com.google.common.graph.ElementOrder<T> unwrapOrder(ElementOrder<T> order)