code: def test_list(self) -> None:
      baseline_values = [
          [1, 2, 3],
          [4, 5, 6, 7],
          [8, 9],
      ]
  
      baselines = ProductBaselines(baseline_values)
  
      baseline_sample = baselines()
  
      self.assertIsInstance(baseline_sample, list)
      for sample_val, vals in zip(baseline_sample, baseline_values):
          self.assertIn(sample_val, vals)
  
file_path: captum/tests/attr/test_baselines.py
imports: from typing import cast, Dict, List, Tuple, Union
  from captum.attr._utils.baselines import ProductBaselines
  from tests.helpers.basic import BaseTest
label_desc: Use image node_id 1 for calling the TestProductBaselines obj's underlying member method code with example usage: obj.test_list() without return types