@Override
  public Object prepareValueForCache(RegionEntryContext context, Object value, EntryEventImpl event,
      boolean isEntryUpdate) {
    throw new IllegalStateException("Should never be called");
  }
get rvv internal low bytes. Used by region entries for transferring to storage
geode-core/src/main/java/org/apache/geode/internal/cache/NonLocalRegionEntry.java