anchor.diff:    factory CompletionMetricsOptions(results) {
       return CompletionMetricsOptions._(
           availableSuggestions: results[AVAILABLE_SUGGESTIONS],
  -        markdown: results[MD],
           overlay: results[OVERLAY],
           printMissedCompletionDetails: results[PRINT_MISSED_COMPLETION_DETAILS],
           printMissedCompletionSummary: results[PRINT_MISSED_COMPLETION_SUMMARY],
  
positive.code:   }
  
    void printHeading(int level, String heading) {
      if (options.markdown) {
        var prefix = '#' * level;
        print('$prefix $heading');
      } else {
        print(heading);
        print(((level == 1) ? '=' : '-') * heading.length);
      }
      print('');
    }
  
  
negative.code:             'completion will match the support in the Dart Plugin for '
              'IntelliJ, without this enabled the completion support matches the '
              'support in LSP.',
          defaultsTo: false,
          negatable: false)
      ..addOption(
  