@Override
    public void registerTimer(long timestamp) {
        timerService.registerProcessingTimeTimer(VoidNamespace.INSTANCE, timestamp);
    }
@Test
    void testRegisterProcessingTimer() {
        TestInternalTimerService<Integer, VoidNamespace> timerService = getTimerService();
        DefaultProcessingTimeManager manager = new DefaultProcessingTimeManager(timerService);
        assertThat(timerService.numProcessingTimeTimers()).isZero();
        manager.registerTimer(100L);
        assertThat(timerService.numProcessingTimeTimers()).isOne();
    }