CounterShortIdCache { public void shortenIdsIfAvailable(java.util.@Nullable List<CounterUpdate> counters) { if (counters == null) { return; } for (CounterUpdate update : counters) { cache.shortenIdsIfAvailable(update); } }  void storeNewShortIds(
      final ReportWorkItemStatusRequest request, final ReportWorkItemStatusResponse reply); void shortenIdsIfAvailable(java.util.@Nullable List<CounterUpdate> counters);  }
@Test public void testNullUpdates() { CounterShortIdCache shortIdCache = new CounterShortIdCache(); shortIdCache.shortenIdsIfAvailable(null); }