@Override
  public void updateSizeOnFaultIn(Object key, int newSize, int bytesOnDisk) {
    // only used by bucket regions
  }
This constructor is used when we are closing an existing region. We want to remember that it is
still present in the disk store.
geode-core/src/main/java/org/apache/geode/internal/cache/PlaceHolderDiskRegion.java