code: def _assert_autocast_enabled(self):
      if self.trainer.precision_plugin.device == "cpu":
          assert torch.is_autocast_cpu_enabled()
      else:
          assert torch.is_autocast_enabled()
  
file_path: pytorch-lightning/tests/tests_pytorch/models/test_amp.py
imports: import os
  from unittest import mock
  import pytest
  import torch
  from lightning.fabric.plugins.environments import SLURMEnvironment
  from lightning.pytorch import Trainer
  from lightning.pytorch.demos.boring_classes import BoringModel, RandomDataset
  from torch.utils.data import DataLoader
  import tests_pytorch.helpers.utils
  from tests_pytorch.helpers.runif import RunIf
label_desc: Use image node_id 3 for calling the AMPTestModel obj's underlying member method code with example usage: obj._assert_autocast_enabled() without return types