Method Add

tensorflow/core/util/tensor_slice_writer.cc:43–45

    builder_.reset(new table::TableBuilder(option, f));
  }
  void Add(StringPiece key, StringPiece val) override {
    builder_->Add(key, val);
  }
  Status Finish(int64* file_size) override {
    *file_size = -1;
    Status s = builder_->Finish();