code: def test_chunked_teacher(self):
      valid, test = self._distributed_train_model(
          task="integration_tests",
          datatype="train:stream",
          num_epochs=5,
          dynamic_batching=None,
      )
      assert valid["exs"].value() == inttests.NUM_TEST
      assert test["exs"].value() == inttests.NUM_TEST
  
imports: import os
  import unittest
  import parlai.utils.testing
  import parlai.scripts.build_dict
  import parlai.scripts.multiprocessing_train
  import parlai.tasks.integration_tests.agents
label_desc: Use image node_id 7 for calling the TestDistributed obj's underlying member method code with example usage: obj.test_chunked_teacher() without return types