@OnlyForTest
    protected static ThreadPoolExecutor getExecutor(String groupId) {
        return GROUP_THREAD_POOLS.getOrDefault(groupId, GlobalThreadPoolHolder.INSTANCE);
    }
@Test
    public void testInvalidGroup() {
        ThreadPoolExecutor executor1 = ThreadPoolsFactory.getExecutor(GROUP_ID_001);
        ThreadPoolExecutor executor = ThreadPoolsFactory.getExecutor("test");
        Assert.assertEquals(executor1, executor);
    }