Method initialize

lib/NGT/ObjectRepository.h:37–40

      : dimension(dim), type(ot), sparse(false), innerProduct(false) {}

  void initialize() {
    deleteAll();
    Parent::push_back((PersistentObject *)0);
  }

  void serialize(const std::string &ofile, ObjectSpace *ospace) {
    std::ofstream objs(ofile);