code: def test_model_loader_factory(self):
      model_loader = ModelLoaderFactory.get_model_loader()
  
      assert isinstance(model_loader, TsModelLoader)
  
imports: import importlib
  import inspect
  import os
  import sys
  import types
  from collections import namedtuple
  import mock
  import pytest
  from ts.model_loader import ModelLoaderFactory, TsModelLoader
  from ts.model_service.model_service import SingleNodeService
  from ts.torch_handler.request_envelope.json import JSONEnvelope
  from ts.utils.util import list_classes_from_module
label_desc: Use image node_id 1 for calling the TestModelFactory obj's underlying member method code with example usage: obj.test_model_loader_factory() without return types