anchor.diff:  }
   
   TaskFunction createHelloWorldCompileTest() {
  -  return new CompileTest('${flutterDirectory.path}/examples/hello_world').run;
  +  return new CompileTest('${flutterDirectory.path}/examples/hello_world', reportPackageContentSizes: true).run;
   }
   
   TaskFunction createComplexLayoutCompileTest() {
  
positive.code:     else
        options.add('--no-preview-dart-2');
      setLocalEngineOptionIfNecessary(options);
      switch (deviceOperatingSystem) {
        case DeviceOperatingSystem.ios:
          options.insert(0, 'ios');
  
negative.code: 
        final Map<String, dynamic> metrics = <String, dynamic>{}
          ..addAll(await _compileAot())
          ..addAll(await _compileApp(reportPackageContentSizes: reportPackageContentSizes))
          ..addAll(await _compileDebug())
          ..addAll(_suffix(await _compileAot(previewDart2: false), '__dart1'))
          ..addAll(_suffix(await _compileApp(previewDart2: false), '__dart1'))
  