anchor.diff:      error.apply();
     }
     print('$clock ${bold}Test successful.$reset');
  -}
  -
  -/// Returns whether or not Linux desktop tests should be run.
  -///
  -/// The branch restrictions here should stay in sync with features.dart.
  -bool _shouldRunLinux() {
  -  return Platform.isLinux && (branchName != 'beta' && branchName != 'stable');
  -}
  -
  -/// Returns whether or not macOS desktop tests should be run.
  -///
  -/// The branch restrictions here should stay in sync with features.dart.
  -bool _shouldRunMacOS() {
  -  return Platform.isMacOS && (branchName != 'beta' && branchName != 'stable');
  -}
  -
  -/// Returns whether or not Windows desktop tests should be run.
  -///
  -/// The branch restrictions here should stay in sync with features.dart.
  -bool _shouldRunWindows() {
  -  return Platform.isWindows && (branchName != 'beta' && branchName != 'stable');
   }
   
   /// Verify the Flutter Engine is the revision in
  
positive.code:   // distribution of costs, but the seed is fixed so that issues are reproducible.
    final List<ShardRunner> tests = <ShardRunner>[
      for (final FileSystemEntity exampleDirectory in exampleDirectories)
          () => _runExampleProjectBuildTests(exampleDirectory),
      if (branchName != 'beta' && branchName != 'stable')
        ...<ShardRunner>[
          // Web compilation tests.
            () =>  _flutterBuildDart2js(
            path.join('dev', 'integration_tests', 'web'),
            path.join('lib', 'main.dart'),
          ),
          // Should not fail to compile with dart:io.
            () =>  _flutterBuildDart2js(
            path.join('dev', 'integration_tests', 'web_compile_tests'),
            path.join('lib', 'dart_io_import.dart'),
          ),
        ],
    ]..shuffle(math.Random(0));
  
    await _runShardRunnerIndexOfTotalSubshard(tests);
  
negative.code:       print('Example project ${path.basename(examplePath)} has no macos directory, skipping macOS');
      }
    }
    if (Platform.isWindows) {
      if (Directory(path.join(examplePath, 'windows')).existsSync()) {
        await _flutterBuildWin32(examplePath, release: false, additionalArgs: additionalArgs, verifyCaching: verifyCaching);
        await _flutterBuildWin32(examplePath, release: true, additionalArgs: additionalArgs, verifyCaching: verifyCaching);
  