code: def test_loading_rai_insights_without_model_file(self):
      data = load_imagenet_dataset()
      pred = create_image_classification_pipeline()
      task_type = ModelTask.IMAGE_CLASSIFICATION
      class_names = load_imagenet_labels()
      test = data[:3]
      label = ImageColumns.LABEL
      serializer = ImageClassificationPipelineSerializer()
  
      rai_insights = RAIVisionInsights(
          pred,
          test,
          label,
          task_type=task_type,
          classes=class_names,
          serializer=serializer,
      )
  
      with TemporaryDirectory() as tmpdir:
          assert rai_insights.model is not None
          save_path = Path(tmpdir) / "rai_insights"
          rai_insights.save(save_path)
  
          # Remove the model.pkl file to cause an exception to occur
          # while loading the model.
          model_name = "image-classification-model"
          model_pkl_path = Path(tmpdir) / "rai_insights" / model_name
          shutil.rmtree(model_pkl_path)
          match_msg = "No file or directory found"
          with pytest.raises(OSError, match=match_msg):
              without_model_rai_insights = RAIVisionInsights.load(
                  save_path
              )
              assert without_model_rai_insights.model is None
  
imports: import shutil
  from pathlib import Path
  from tempfile import TemporaryDirectory
  from unittest.mock import patch
  import numpy
  import PIL
  import pytest
  from common_vision_utils import DummyFlowersPipelineSerializer, ImageClassificationPipelineSerializer, ObjectDetectionPipelineSerializer, create_dummy_model, create_image_classification_pipeline, load_flowers_dataset, load_fridge_object_detection_dataset, load_imagenet_dataset, load_imagenet_labels, retrieve_fridge_object_detection_model
  from rai_vision_insights_validator import run_and_validate_serialization
  from responsibleai_vision import ModelTask, RAIVisionInsights
  from responsibleai_vision.common.constants import ImageColumns
label_desc: Use image node_id 3 for calling the TestRAIVisionInsightsSaveAndLoadScenarios obj's underlying member method code with example usage: obj.test_loading_rai_insights_without_model_file() without return types