Note that StorageException in the previous example could also simply be a BaseStorageException that all the methods throw, even if one of them is DiskFullError(

Note that StorageException in the previous example could also simply be a BaseStorageException that all the methods throw, even if one of them is DiskFullError(BaseStorageException) or ObjectStorageLimitExceededError(BaseStorageException), and another is InvalidFilenameError(BaseStorageException).