code: def testSourceAndTargetPathsTrainModern2Shakespeare(self):
      tmp_dir = "tmp_dir"
      modern_to_shakespeare_data_gen = (
          style_transfer.StyleTransferModernToShakespeare()
      )
      (
          actual_source,
          actual_target,
      ) = modern_to_shakespeare_data_gen.source_target_paths(
          problem.DatasetSplit.TRAIN, tmp_dir
      )
  
      expected_source = "{}/train.modern".format(tmp_dir)
      expected_target = "{}/train.original".format(tmp_dir)
  
      self.assertEqual(actual_source, expected_source)
      self.assertEqual(actual_target, expected_target)
  
file_path: tensor2tensor/tensor2tensor/data_generators/style_transfer_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from tensor2tensor.data_generators import problem
  from tensor2tensor.data_generators import style_transfer
  import tensorflow.compat.v1
label_desc: Use image node_id 1 for calling the StyleTransferProblemShakespeareTest obj's underlying member method code with example usage: obj.testSourceAndTargetPathsTrainModern2Shakespeare() without return types