code: def testText2TextTxtTabIterator(self):
      inputs = []
      targets = []
      for entry in text_problems.text2text_txt_tab_iterator(
          self.tabbed_file
      ):
          inputs.append(entry["inputs"])
          targets.append(entry["targets"])
      self.assertEqual(inputs, self.inputs)
      self.assertEqual(targets, self.targets)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import shutil
  from tensor2tensor.data_generators import problem
  from tensor2tensor.data_generators import text_encoder
  from tensor2tensor.data_generators import text_problems
  import tensorflow.compat.v1
  from tensorflow.compat.v1 import estimator
label_desc: Use image node_id 8 for calling the TextProblems obj's underlying member method code with example usage: obj.testText2TextTxtTabIterator() without return types