@SuppressWarnings("unchecked")
 @Override
 public void deserialize(DataSerializationHelper mgr, SLongDictionaryArray source)
     throws DeserializationException {
   sortedValues = mgr.deserializeChild(CompressedLongArray.class, source.getArr());
 }
 @Override
 public void serialize(DataSerializationHelper mgr, SLongDictionaryArray target)
     throws SerializationException {
   target.setArr(mgr.serializeChild(SLongCompressedArray.class, sortedValues));
 }