code: def test_c4(self):
      gin.bind_parameter("c4_preprocess.max_target_length", 2048)
      gin.bind_parameter("c4_preprocess.tokenization", "spc")
      gin.bind_parameter("c4_preprocess.spm_path", _spm_path())
  
      # Just make sure this doesn't throw.
      _ = tf_inputs.data_streams(
          "c4",
          data_dir=_TESTDATA,
          input_name="targets",
          target_name="text",
          preprocess_fn=tf_inputs.c4_preprocess,
      )
  
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 13 for calling the TFInputsTest obj's underlying member method code with example usage: obj.test_c4() without return types