code: def setUpClass(cls):
      super().setUpClass()
      cls.alphabet_dataset = lit_dataset.IndexedDataset(
          id_fn=caching.input_hash, examples=_ALPHABET_EXAMPLES
      )
      cls.emotion_dataset = lit_dataset.IndexedDataset(
          id_fn=caching.input_hash, examples=_EMOTION_EXAMPLES
      )
      cls.model = caching.CachingModelWrapper(
          glue_models.SST2Model(BERT_TINY_PATH), "test"
      )
  
file_path: lit/lit_nlp/components/tcav_int_test.py
imports: import random
  from absl.testing import absltest
  from absl.testing import parameterized
  from lit_nlp.api import dataset
  from lit_nlp.components import tcav
  from lit_nlp.examples.models import glue_models
  from lit_nlp.lib import caching
  from lit_nlp.lib import testing_utils
  from lit_nlp.lib import file_cache
label_desc: Use image node_id 1 for calling the ModelBasedTCAVTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types