anchor.diff:        List<Example> examples = <Example>[];
         String externalTest;
         bool frontendInternal = false;
  -      String analyzerCode;
  +      List<String> analyzerCodes;
         Severity severity;
         YamlNode badSeverity;
         YamlNode unnecessarySeverity;
  
positive.code:             break;
  
            case "analyzerCode":
              analyzerCode = value;
              break;
  
            case "bytes":
  
negative.code:           null,
            exampleAndAnalyzerCodeRequired &&
                    !frontendInternal &&
                    analyzerCodes == null
                ? "No analyzer code for $name."
                    "\nTry running"
                    " <BUILDDIR>/dart-sdk/bin/dartanalyzer --format=machine"
  