@Override
  public void toData(DataOutput out,
      SerializationContext context) throws IOException {
    out.writeInt(size());
    context.getSerializer().writeObject(structType, out);
    for (final Object o : this) {
      context.getSerializer().writeObject(o, out);
    }
  }
@param itr iterator over the Object[] instances of fieldValues
geode-core/src/main/java/org/apache/geode/cache/query/internal/StructSet.java