code: def teardown(self, stage: str = cast(str, None)):
      return self.training_module.teardown(stage)
  
imports: from __future__ import annotations
  import warnings
  from typing import Any, Iterable, List, cast, TYPE_CHECKING
  import torch.optim
  import torch.nn
  from torch.optim import Optimizer
  import nni.nas.nn.pytorch
  from nni.nas.evaluator.pytorch import LightningModule, Trainer
  from nni.mutable import Sample
  from .supermodule.base import BaseSuperNetModule
label_desc: Use image node_id 13 for calling the BaseOneShotLightningModule obj's underlying member method code with example usage: obj.teardown(stage) and returns: self