anchor.diff:    // 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'),
  -        ),
  -      ],
  +      () => _runExampleProjectBuildTests(exampleDirectory),
  +    ...<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);
  
positive.code:       print('Example project ${path.basename(examplePath)} has no macos directory, skipping macOS');
      }
    }
    if (_shouldRunWindows()) {
      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);
  
negative.code:       print('Example project ${path.basename(examplePath)} has no linux directory, skipping Linux');
      }
    }
    if (Platform.isMacOS) {
      if (Directory(path.join(examplePath, 'macos')).existsSync()) {
        await _flutterBuildMacOS(examplePath, release: false, additionalArgs: additionalArgs, verifyCaching: verifyCaching);
        await _flutterBuildMacOS(examplePath, release: true, additionalArgs: additionalArgs, verifyCaching: verifyCaching);
  