code: def testInputAndTargetModalitiesAreReversed(self):
      class WasReversedTestProblem(problem_module.Problem):
          def __init__(self, was_reversed):
              super(WasReversedTestProblem, self).__init__(
                  was_reversed, False
              )
  
          def hparams(self, defaults, model_hparams):
              hp = defaults
              hp.modality["inputs"] = "inputs_modality"
              hp.modality["targets"] = "targets_modality"
  
      problem = WasReversedTestProblem(was_reversed=True)
      p_hparams = problem.get_hparams()
      self.assertEqual(p_hparams.modality["inputs"], "targets_modality")
      self.assertEqual(p_hparams.modality["targets"], "inputs_modality")
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing import parameterized
  import numpy
  from tensor2tensor.data_generators import algorithmic
  from tensor2tensor.data_generators import problem
  from tensor2tensor.data_generators import problem_hparams
  from tensor2tensor.layers import modalities
  from tensor2tensor.utils import hparam
  from tensor2tensor.utils import test_utils
  import tensorflow.compat.v1
  from tensorflow.compat.v1 import estimator
label_desc: Use image node_id 10 for calling the ProblemTest obj's underlying member method code with example usage: obj.testInputAndTargetModalitiesAreReversed() without return types