@Override
  public void toData(DataOutput out,
      SerializationContext context) throws IOException {
    DataSerializer.writeByteArray(value, out);
  }
Return current value regardless of whether it is serialized or deserialized: if it was
serialized than it is a byte[], otherwise it is not a byte[].
geode-core/src/main/java/org/apache/geode/internal/cache/StoreAllCachedDeserializable.java