code: def test_classy_model_adapter(self):
      model = TestModel()
      classy_model = ClassyModel.from_model(model)
      # test that the returned object is an instance of ClassyModel
      self.assertIsInstance(classy_model, ClassyModel)
      # test that the returned object is also an instance of _ClassyModelAdapter
      self.assertIsInstance(classy_model, _ClassyModelAdapter)
  
      # test that forward works correctly
      input = torch.zeros((100, 10))
      output = classy_model(input)
      self.assertEqual(output.shape, (100, 5))
  
      # test that extract_features works correctly
      input = torch.zeros((100, 10))
      output = classy_model.extract_features(input)
      self.assertEqual(output.shape, (100, 20))
  
      # test that get_classy_state and set_classy_state work
      nn.init.constant_(classy_model.model.linear.weight, 1)
      weights = copy.deepcopy(classy_model.model.linear.weight.data)
      state_dict = classy_model.get_classy_state(deep_copy=True)
      nn.init.constant_(classy_model.model.linear.weight, 0)
      classy_model.set_classy_state(state_dict)
      self.assertTrue(
          torch.allclose(weights, classy_model.model.linear.weight.data)
      )
  
imports: import copy
  import os
  import shutil
  import tempfile
  import unittest
  import torch
  import torch.nn
  from classy_vision.generic.util import load_checkpoint
  from classy_vision.heads import FullyConnectedHead, IdentityHead
  from classy_vision.hooks import CheckpointHook
  from classy_vision.models import build_model, ClassyModel, ClassyModelWrapper, register_model
  from classy_vision.models.classy_model import _ClassyModelAdapter
  from classy_vision.tasks import build_task
  from classy_vision.trainer import LocalTrainer
  from test.generic.config_utils import get_fast_test_task_config, get_test_task_config
  from torchvision import models
label_desc: Use image node_id 1 for calling the TestClassyModelAdapter obj's underlying member method code with example usage: obj.test_classy_model_adapter() without return types