assertNotNull(b2a);
        SingletonContainer.Bean2 b2b = injector.getInstance(SingletonContainer.Bean2.class);
        assertNotNull(b2b);
        assertNotEquals(b2a.num, b2b.num);
    }

    static class SingletonContainer {
        private static final AtomicInteger bean1 = new AtomicInteger();
        private static final AtomicInteger bean2 = new AtomicInteger();

        @Named
        @Singleton