Method addRuntimeStat

bolt/exec/tests/AsyncSpillerTest.cpp:42–45

      : stats_{stats} {}

  void addRuntimeStat(const std::string& name, const RuntimeCounter& value)
      override {
    addOperatorRuntimeStats(name, value, stats_);
  }

 private:
  std::unordered_map<std::string, RuntimeMetric>& stats_;