code: def testLangNotInLangSet(self):
      with TestPipeline() as p:
          tokens = p | beam.Create(self.sample_input)
          result = tokens | beam.ParDo(utils.FilterTokensByLang({"fr"}))
          assert_that(result, equal_to([]))
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import logging
  import tempfile
  from absl.testing import absltest
  import apache_beam
  from apache_beam.testing.test_pipeline import TestPipeline
  from apache_beam.testing.util import assert_that
  from apache_beam.testing.util import equal_to
  import tensorflow.compat.v1
  from tensorflow_text.tools.wordpiece_vocab import utils
label_desc: Use image node_id 3 for calling the FilterTokensByLangTest obj's underlying member method code with example usage: obj.testLangNotInLangSet() without return types