private DiskStoreImpl getDiskStore(Region region) {
    return ((DiskRecoveryStore) region).getDiskStore();
  }
Regression test for TRAC #41770: ConcurrentRegionOperationsJUnitTest fails with duplicate
create in an oplog
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/DiskRegionJUnitTest.java