anchor.diff:    staticMember,
     typeReference,
     localReference,
  +  paramReference,
     topLevel
   }
   
  
positive.code:     _printWorstResults('Static members', metrics.staticMemberWorstResults);
      _printWorstResults('Type references', metrics.topLevelWorstResults);
      _printWorstResults('Local references', metrics.localRefWorstResults);
      _printWorstResults('Top level', metrics.topLevelWorstResults);
    }
  
  
negative.code:           return typeRefWorstResults;
          case CompletionGroup.localReference:
            return localRefWorstResults;
          case CompletionGroup.paramReference:
            return paramRefWorstResults;
          case CompletionGroup.topLevel:
            return topLevelWorstResults;
        }
  