@Override
  protected void flushIfNecessary(Region r) {
    DistributedRegion dr = (DistributedRegion) r;
    Set<InternalDistributedMember> targets = dr.getDistributionAdvisor().adviseCacheOp();
    StateFlushOperation.flushTo(targets, dr);
  }
Tests the compatibility of creating certain kinds of subregions of a local region.

@see RegionFactory#createSubregion
geode-core/src/distributedTest/java/org/apache/geode/cache30/DistributedNoAckRegionDUnitTest.java