code: public String getReason() {
          if (lastExceededValue) {
              return String.format("Metric '%s' has aggregated-value=%d %s %d as threshold", metric.name(), lastAggregatedValue, operator.symbol, thresholdValue);
          } else {
              return String.format("Metric %s: aggregated-value=%d", metric.name(), lastAggregatedValue);
          }
      }
docs: Returns summary intended for logging.
  
  @return a summary