code: def testParallelRead(self):
      test_filenames = self._createFiles(10, 10)
      files = dataset_ops.Dataset.from_tensor_slices(
          test_filenames
      ).repeat(10)
      expected_output = []
      for j in range(10):
          expected_output.extend(
              self._lineText(j, i) for i in range(10)
          )
      dataset = readers.TextLineDataset(files, num_parallel_reads=4)
      self.assertDatasetProduces(
          dataset,
          expected_output=expected_output * 10,
          assert_items_equal=True,
      )
  
imports: import gzip
  import os
  import pathlib
  import zlib
  from absl.testing import parameterized
  from tensorflow.python.data.kernel_tests import checkpoint_test_base
  from tensorflow.python.data.kernel_tests import test_base
  from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.data.ops import options
  from tensorflow.python.data.ops import readers
  from tensorflow.python.framework import combinations
  from tensorflow.python.framework import errors
  from tensorflow.python.platform import test
  from tensorflow.python.util import compat
label_desc: Use image node_id 2 for calling the TextLineDatasetTest obj's underlying member method code with example usage: obj.testParallelRead() without return types