@Override
  public Set<DistributedMember> getMembers(@SuppressWarnings("rawtypes") Region region) {
    if (region instanceof DistributedRegion) {
      DistributedRegion distributedRegion = (DistributedRegion) region;
      return uncheckedCast(distributedRegion.getDistributionAdvisor().adviseCacheOp());
    }
    if (region instanceof PartitionedRegion) {
      PartitionedRegion partitionedRegion = (PartitionedRegion) region;
      return uncheckedCast(partitionedRegion.getRegionAdvisor().adviseAllPRNodes());
    }
    return emptySet();
  }
Used by unit tests to allow them to change the default disk store name.
geode-core/src/main/java/org/apache/geode/internal/cache/GemFireCacheImpl.java