private void createRegionWithDiskStoreAndAsyncQueue(File baseDir, int queueSize) {
    createDiskStoreWithQueue(baseDir, queueSize, TIME_INTERVAL);

    RegionFactory regionFactory =
        cache.<String, String>createRegionFactory(RegionShortcut.PARTITION_PERSISTENT);
    regionFactory.setDiskSynchronous(false);
    regionFactory.setDiskStoreName(DISK_STORE_NAME);
    aRegion = regionFactory.create(REGION_NAME);
  }
Returns true if the files of the given oplog file are in the
given directory.
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/DiskStoreImplIntegrationTest.java