@Retained
  public TimestampedEntryEvent getTimestampedEvent(final int newDSID, final int oldDSID,
      final long newTimestamp, final long oldTimestamp) {
    return new TimestampedEntryEventImpl(this, newDSID, oldDSID, newTimestamp, oldTimestamp);
  }
returns a copy of this event with the additional fields for WAN conflict resolution
geode-core/src/main/java/org/apache/geode/internal/cache/EntryEventImpl.java