code: def test_load_model_with_envelope(self, patches):
      patches.mock_open.side_effect = [
          mock.mock_open(read_data=self.mock_manifest).return_value
      ]
      handler = "dummy_func_model_service:infer"
      service = self.model_loader.load(
          self.model_name, self.model_dir, handler, envelope="json"
      )
  
      assert isinstance(service._entry_point.__self__, JSONEnvelope)
      assert service._entry_point.__name__ == "handle"
  
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 7 for calling the TestLoadModels obj's underlying member method code with example usage: obj.test_load_model_with_envelope(patches) without return types