code: def _spm_path():
      return os.path.join(_TESTDATA, "sentencepiece.model")
  
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 4 for calling a global function with example usage: _spm_path() and returns: os