ProducerIdsBlock nextProducerBlock() {
        return nextProducerBlock.get();
    }
@Test
    public void testGenerateProducerIds() {
        for (int i = 0; i < 100; i++) {
            generateProducerIds(producerIdControlManager, i % 4, 100);
        }
        assertEquals(new ProducerIdsBlock(3, 100000, 1000), producerIdControlManager.nextProducerBlock());
    }