code: def get_model_config(self, use_head):
      config = {"name": "my_test_model"}
      if use_head:
          config["heads"] = [
              {
                  "name": "fully_connected",
                  "unique_id": "default_head",
                  "num_classes": 3,
                  "fork_block": "linear",
                  "in_plane": 5,
              }
          ]
      return config
  
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 3 for calling the TestClassyModel obj's underlying member method code with example usage: obj.get_model_config(use_head) and returns: config