anchor.diff:  const String _kOptionSdkRoot = 'sdk-root';
   const String _kOptionTestFile = 'test-file';
   const String _kOptionDillFile = 'dill-file';
  +const String _kOptionIcudtl = 'icudtl';
   const List<String> _kRequiredOptions = <String>[
     _kOptionPackages,
     _kOptionShell,
  
positive.code:         fs.link(artifacts.getArtifactPath(Artifact.flutterTester));
      testerDestLink.parent.createSync(recursive: true);
      testerDestLink.createSync(shellPath);
      final Directory sdkRootDest =
          fs.directory(artifacts.getArtifactPath(Artifact.flutterPatchedSdkPath));
      sdkRootDest.createSync(recursive: true);
  
negative.code:   _kOptionSdkRoot,
    _kOptionTestFile,
    _kOptionDillFile,
    _kOptionIcudtl
  ];
  const String _kOptionCoverage = 'coverage';
  const String _kOptionCoveragePath = 'coverage-path';
  