public DataPolicy getDataPolicy() {
      if (event != null) {
        return event.getRegion().getAttributes().getDataPolicy();
      }
      return null;
    }
Utility to set the new value in the EntryEventImpl based on the given deserialization value;
also called from QueuedOperation
geode-core/src/main/java/org/apache/geode/internal/cache/UpdateOperation.java