@Override
  public void initializeStats(long numEntriesInVM, long numOverflowOnDisk,
      long numOverflowBytesOnDisk) {
    throw new IllegalStateException("initializeStats should not be called on ValidatingDiskRegion");
  }
A disk region that is created when doing offline validation.

@since GemFire prPersistSprint3
geode-core/src/main/java/org/apache/geode/internal/cache/ValidatingDiskRegion.java