public static Collection<Integer> getShardingItems(final String jobId) {
        return JOBS.containsKey(jobId) ? JOBS.get(jobId).getJobRunnerManager().getShardingItems() : Collections.emptyList();
    }
@Test
    void assertGetExistedShardingItems() {
        when(job.getJobRunnerManager().getShardingItems()).thenReturn(Arrays.asList(1, 2, 3));
        assertThat(PipelineJobRegistry.getShardingItems("foo_job"), is(Arrays.asList(1, 2, 3)));
    }