boolean regionStillCreated(DiskRegionView dr) {
    lock(false);
    try {
      return getDiskRegionById(dr.getId()) != null;
    } finally {
      unlock(false);
    }
  }
Return true if the given dr is still created in this IF.
geode-core/src/main/java/org/apache/geode/internal/cache/DiskInitFile.java