List<PartitionedRegion> getColocatedChildRegions(PartitionedRegion partitionedRegion) {
    return ColocationHelper.getColocatedChildRegions(partitionedRegion);
  }
Report an estimate of the number of primary buckets managed locally The result of this method
is not stable.
geode-core/src/main/java/org/apache/geode/internal/cache/PartitionedRegionDataStore.java