anchor.diff:        'Measures the speed of deserialization from JSON to Streamy entities');
   
     void run() {
  -    var foo = _marshaller.unmarshalFoo(JSON.decode(js));
  +    var foo = _MARSHALLER.unmarshalFoo(JSON.decode(js));
     }
   
     void setup() {
       var foo = makePopulatedFoo(LEVEL);
  -    js = JSON.encode(_marshaller.marshalFoo(foo));
  +    js = JSON.encode(_MARSHALLER.marshalFoo(foo));
     }
   }
   
  
positive.code: 
    void setup() {
      var foo = makePopulatedFoo(LEVEL);
      js = JSON.encode(_marshaller.marshalFoo(foo));
      subReports.add(
          new StreamyBenchmarkReport.subReport(this, 'JSON-Length', js.length,
              'chars'));
  
negative.code: const LEVEL = 3;
  const ENTITIES_IN_LIST = 1000;
  final Random random = new Random(1234);
  const _MARSHALLER = const Marshaller();
  
  /// Add your new benchmark here so it is autmatically picked up by command-line
  /// and in-browser runners.
  