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  using namespace prometheus;
  
  Registry MetricsRegistry;

  using AudioFreqHistogram = Histogram<double>;
  using AudioFreqHistogramFamily = CustomFamily<AudioFreqHistogram>;

  AudioFreqHistogramFamily &audioFreqHistogram{
      AudioFreqHistogram::Family::Build(MetricsRegistry, "frequencies", "audio frequencies, Hz", {})
  };
  
  std::vector<double> frequencyBoundaries;
  for (int i = 0; i < 8000; i += 100) {
    frequencyBoundaries.push_back(i);
  }

  // ERROR In template: no matching member function for call to 'insert'
  auto &freqHist1 = audioFreqHistogram.Add({}, frequencyBoundaries);

  // ERROR Call to implicitly-deleted copy constructor of 'prometheus::Histogram<double>'
  Histogram<double> freqHist2 = Histogram<double>{frequencyBoundaries};

  // ERROR In template: call to implicitly-deleted copy constructor of 'value_type' (aka 'prometheus::Counter<double>')
  prometheus::Histogram<double> freqHist3 = Histogram<double>(frequencyBoundaries);

//          return dynamic_cast<CustomMetric&>(*metrics_iter->second);
          return (CustomMetric&)(*metrics_iter->second);

        // cumulative_count += static_cast<std::size_t>(bucket_counts_[i].Value());
        cumulative_count += static_cast<std::size_t>(bucket_counts_[i].Get());