void checkForRecoverableRegion(DiskRegionView dr) {
    if (unrecoveredRegionCount.get() > 0) {
      DiskRegionInfo dri = getDRI(dr);
      if (dri != null) {
        if (dri.testAndSetRecovered(dr)) {
          unrecoveredRegionCount.decrementAndGet();
        }
      }
    }
  }
For each dri that this oplog has that is currently unrecoverable check to see if a DiskRegion
that is recoverable now exists.
geode-core/src/main/java/org/apache/geode/internal/cache/Oplog.java