private void putToCreateEachBucket(final VM vm) {
    vm.invoke(() -> {
      Cache cache = getCache();
      Region<Integer, Integer> region = cache.getRegion(
          PARENT_REGION_NAME + SEPARATOR + CHILD_REGION_NAME + SEPARATOR + PARTITIONED_REGION_NAME);

      // using integer keys creates one bucket per entry
      for (int i = 0; i < TOTAL_NUM_BUCKETS; i++) {
        region.put(i, i);
      }
    });
  }
Verifies that destroyRegion, localDestroyRegion and close work properly when PartitionedRegion is
a subregion.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/PartitionedRegionAsSubregionDUnitTest.java