code: def test_build_model(self):
      for cfg in self.model_configs:
          config = self._get_config(cfg)
          model = build_model(config["model"])
          self.assertTrue(isinstance(model, ClassyModel))
          self.assertTrue(
              type(model.input_shape) == tuple
              and len(model.input_shape) == 3
          )
  
file_path: ClassyVision/test/manual/models_classy_vision_model_test.py
imports: import copy
  import unittest
  from collections import defaultdict
  import torch
  from classy_vision.heads import build_head
  from classy_vision.models import build_model, ClassyModel
  from test.generic.config_utils import get_test_model_configs
  from test.generic.utils import compare_model_state
label_desc: Use image node_id 3 for calling the TestClassyModel obj's underlying member method code with example usage: obj.test_build_model() without return types