code: def test_feature_save_load_metadata_slashes(self):
      with testing.tmp_dir() as data_dir:
          fd = features_lib.FeaturesDict(
              {
                  "image/frame": features_lib.Image(shape=(32, 32, 3)),
                  "image/label": features_lib.ClassLabel(num_classes=2),
              }
          )
          fd.save_metadata(data_dir)
          fd.load_metadata(data_dir)
  
imports: import pathlib
  import sys
  import textwrap
  from unittest import mock
  from absl import logging
  from absl.testing import parameterized
  import numpy
  import tensorflow
  from tensorflow_datasets import testing
  from tensorflow_datasets.core import features
label_desc: Use image node_id 6 for calling the FeatureDictTest obj's underlying member method code with example usage: obj.test_feature_save_load_metadata_slashes() without return types