anchor.diff:  /// A wrapper for the collection of [Counter] and [MeanReciprocalRankComputer]
   /// objects for a run of [CompletionMetricsComputer].
   class CompletionMetrics {
  +  /// The maximum number of worst results to collect.
  +  static const maxWorstResults = 10;
  +
     /// The name associated with this set of metrics.
     final String name;
   
  
positive.code:     }
      printMetrics(metricsOldMode);
      printMetrics(metricsNewMode);
      return resultCode;
    }
  
  
negative.code:     if (place.denominator != 0) {
        metrics.successfulMrrComputer.addRank(place.rank);
        metrics.completionCounter.count('successful');
        metrics.recordCompletionResult(
            CompletionResult(place, suggestions, expectedCompletion));
  
        var element = getElement(expectedCompletion.syntacticEntity);
        if (isInstanceMember(element)) {
  