Method ReadOptions

tensorflow/lite/toco/tflite/operator.cc:1849–1853

    return ::tflite::CreateUnpackOptions(*builder, op.num, op.axis);
  }
  void ReadOptions(const TfLiteOptions& options,
                   TocoOperator* op) const override {
    op->num = options.num();
    op->axis = options.axis();
  }

  int GetVersion(const OperatorSignature& op_signature) const override {
    const string& input_name = op_signature.op->inputs[0];