Identity comparison

main.dart

extension type FillInFileId(String value) {}

class FileUploadStatus {
  FileUploadStatus(
    this.fileId,
    this.fileName,
    this.isUploading,
  );

  final FillInFileId fileId;
  final String fileName;
  final bool isUploading;
}

void main() {
  final a = FileUploadStatus(FillInFileId('1'), 'a', false);
  print(a == a);
  final b = FileUploadStatus(FillInFileId('1'), 'a', false);
  print(a == b);
}