try {
        waiterThreadUpdater = lookup.findVarHandle(Waiter.class, "thread", Thread.class);
        waiterNextUpdater = lookup.findVarHandle(Waiter.class, "next", Waiter.class);
        waitersUpdater =
            lookup.findVarHandle(AbstractFutureState.class, "waitersField", Waiter.class);
        listenersUpdater =
            lookup.findVarHandle(AbstractFutureState.class, "listenersField", Listener.class);