code: def setUp(self):
      super().setUp()
      test_spec: lit_types.Spec = {
          "sentence": lit_types.TextSegment(),
          "_id": lit_types.TextSegment(),
          "_meta": lit_types.JsonDict,
      }
      self.model = testing_utils.RegressionModelForTesting(test_spec)
      # Dataset is only used for spec in Scrambler so define once
      self.dataset = lit_dataset.Dataset(
          spec=test_spec,
          examples=[{"text": "blank", "_id": "a1b2c3", "_meta": {}}],
      )
      self.generator = scrambler.Scrambler()
  
file_path: lit/lit_nlp/components/scrambler_test.py
imports: from absl.testing import absltest
  from lit_nlp.api import dataset
  from lit_nlp.api import types
  from lit_nlp.components import scrambler
  from lit_nlp.lib import testing_utils
label_desc: Use image node_id 1 for calling the ScramblerTest obj's underlying member method code with example usage: obj.setUp() without return types