code: def tearDownClass(cls):
      super(OpusTestCustomConfigTest, cls).tearDownClass()
      opus_dataset_builder.Builder.BUILDER_CONFIGS.pop()
  
imports: from tensorflow_datasets import testing
  from tensorflow_datasets.datasets.opus import opus_dataset_builder
  import tensorflow_datasets.public_api
label_desc: Use image node_id 2 for calling the OpusTestCustomConfigTest obj's underlying member method code with example usage: obj.tearDownClass(cls) without return types