@Override
  public DiskEntry initializeRecoveredEntry(Object key, DiskEntry.RecoveredEntry re) {
    ValidatingDiskEntry de = new ValidatingDiskEntry(key, re);
    if (map.putIfAbsent(key, de) != null) {
      throw new InternalGemFireError(
          String.format("Entry already existed: %s", key));
    }
    return de;
  }
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