code: def test_TFDS_mnli_split_is_alt_eval(self):
      with mock.patch("tensorflow_datasets.load") as tfds_load:
          with mock.patch(
              "trax.data.tf_inputs.download_and_prepare",
              lambda _, data_dir: data_dir,
          ):
              _ = tf_inputs.TFDS(
                  "glue/mnli",
                  keys=("premise", "hypothesis"),
                  train=False,
                  use_alt_eval=True,
              )
          call_kwargs = tfds_load.call_args[1]
          self.assertEqual(
              call_kwargs["split"], "validation_mismatched"
          )
  
imports: import collections
  import os
  from unittest import mock
  import gin
  import numpy
  from t5.data import assert_dataset
  from t5.data import preprocessors
  import tensorflow
  import tensorflow_datasets
  from trax.data import inputs
  from trax.data import tf_inputs
label_desc: Use image node_id 5 for calling the TFInputsTest obj's underlying member method code with example usage: obj.test_TFDS_mnli_split_is_alt_eval() without return types