code: def test_not_existing_folder_dataset(self):
      with self.assertRaises(ValueError):
          LightlyDataset(
              "/a-random-hopefully-non/existing-path-to-nowhere/"
          )
  
imports: import os
  import shutil
  import tempfile
  import unittest
  from typing import List, Tuple
  import numpy
  import torchvision
  from PIL.Image import Image
  from lightly.data import LightlyDataset
  from lightly.data._utils import check_images
label_desc: Use image node_id 8 for calling the TestLightlyDataset obj's underlying member method code with example usage: obj.test_not_existing_folder_dataset() without return types