// Initializes `QuantizationReport` by collecting `QuantizationResults` from
  // `module_op`.
  explicit QuantizationReport(ModuleOp module_op);

  // Adds a `QuantizationResult` to the report.
  void AddQuantizationResult(
      ::stablehlo::quantization::QuantizationResult&& result);

  // Returns `QuantizationResults` that are registered in this report.
  const ::stablehlo::quantization::QuantizationResults& GetQuantizationResults()

  QuantizationReport report{};

  const QuantizationResults& results = report.GetQuantizationResults();
  ASSERT_THAT(results.results(), IsEmpty());
}

TEST_F(QuantizationReportTest, AddQuantizationResult) {
  // Construct a `QuantizationResult` to add, representing a unit named
  // `quantized_my_function` that is not quantized.
  QuantizationResult result{};

  QuantizationResults results{};

  PopulateQuantizedResults(module_op, results);
  PopulateNonQuantizedResults(module_op, results);

  return results;
}

void QuantizationReport::AddQuantizationResult(QuantizationResult&& result) {
  *quantization_results_.add_results() = std::move(result);
}

std::string QuantizationReport::ToString() const {
  std::string results_str{};