anchor.diff:  
   void main() {
     group('clean command', () {
  -    Xcode xcode;
  -    FakeXcodeProjectInterpreter xcodeProjectInterpreter;
  +    late Xcode xcode;
  +    late FakeXcodeProjectInterpreter xcodeProjectInterpreter;
   
       setUp(() {
         xcodeProjectInterpreter = FakeXcodeProjectInterpreter();
  
positive.code:     });
  
      group('general', () {
        MemoryFileSystem fs;
        Directory buildDirectory;
  
        setUp(() {
          fs = MemoryFileSystem.test();
  
negative.code:     });
  
      group('Windows', () {
        late FakePlatform windowsPlatform;
        late MemoryFileSystem fileSystem;
        late FileExceptionHandler exceptionHandler;
  
        setUp(() {
          windowsPlatform = FakePlatform(operatingSystem: 'windows');
  