code: def test_fail_if_neither_opencv_nor_pil_is_installed(self):
      with make_pil_fail():
          with make_cv2_fail():
              self.assertFeature(
                  feature=features_lib.Image(
                      shape=(128, 128, 3), dtype=np.uint8
                  ),
                  shape=(128, 128, 3),
                  dtype=np.uint8,
                  tests=[
                      testing.FeatureExpectationItem(
                          value=randint(
                              256, size=(128, 128, 3), dtype=np.uint8
                          ),
                          raise_cls_np=ImportError,
                          raise_msg="requires either OpenCV or PIL",
                      )
                  ],
              )
  
imports: import contextlib
  import enum
  import os
  import pathlib
  from typing import Optional, Type
  from absl.testing import parameterized
  import numpy
  import PIL
  import pytest
  import tensorflow
  import tensorflow_datasets
  from tensorflow_datasets import testing
  from tensorflow_datasets.core import features
label_desc: Use image node_id 6 for calling the ImageFeatureTest obj's underlying member method code with example usage: obj.test_fail_if_neither_opencv_nor_pil_is_installed() without return types