anchor.diff:  
     test_nonConst_lessThan() async {
       // TODO(brianwilkerson) Add '>>>' to MockSdk and remove the code
  -    //  UNDEFINED_OPERATOR when constant update is enabled by default.
  +    //  UNDEFINED_OPERATOR when triple_shift is enabled by default.
       await verifyVersion('2.2.0', '''
   var a = 42 >>> 3;
   ''', expectedErrors: [
  
positive.code:   String get testPackageLanguageVersion =>
        '${ExperimentStatus.currentVersion.major}.'
        '${ExperimentStatus.currentVersion.minor}';
  
    @override
    void setUp() {
      super.setUp();
      writeTestPackageAnalysisOptionsFile(
        AnalysisOptionsFileConfig(
          experiments: [
            EnableString.triple_shift,
          ],
        ),
      );
    }
  
    test_const_equals() async {
      // TODO(brianwilkerson) Add '>>>' to MockSdk and remove the code
  
negative.code: 
    test_nonConst_equals() async {
      // TODO(brianwilkerson) Add '>>>' to MockSdk and remove the code
      //  UNDEFINED_OPERATOR when triple_shift is enabled by default.
      await verifyVersion('2.5.0', '''
  var a = 42 >>> 3;
  ''', expectedErrors: [
  