| # Copyright (c) Meta Platforms, Inc. and affiliates. | |
| # | |
| # This source code is licensed under the MIT license found in the | |
| # LICENSE file in the root directory of this source tree. | |
| from dataclasses import dataclass | |
| @dataclass(frozen=True) | |
| class A: | |
| pass | |
| class B(A): | |
| def method(self) -> None: | |
| pass |