code: def test_train_and_eval_overfit(self):
      ogb_path = pathlib.Path(train_flax.__file__).parents[0]
      master_csv_path = pathlib.Path(
          ogb_path, "test_data", "master.csv"
      )
      split_path = pathlib.Path(ogb_path, "test_data", "train.csv.gz")
      data_path = master_csv_path.parents[0]
      temp_dir = self.create_tempdir().full_path
      train_flax.train(
          data_path, master_csv_path, split_path, 1, 101, temp_dir
      )
      _, accuracy = train_flax.evaluate(
          data_path, master_csv_path, split_path, temp_dir
      )
      self.assertEqual(accuracy, 1.0)
  
imports: import pathlib
  from absl.testing import absltest
  from jraph.ogb_examples import train_flax
label_desc: Use image node_id 1 for calling the TrainTest obj's underlying member method code with example usage: obj.test_train_and_eval_overfit() without return types