class_docstr: Checks that saved data is correct with a single batch.
code: def test_roundDataCorrect(self):
      self._test_roundDataCorrect()
  
imports: import copy
  import unittest
  import parlai.core.tod.tod_test_utils.test_agents
  import parlai.core.tod.tod_core
  import parlai.scripts.tod_world_script
  from parlai.core.tod.tod_agents import StandaloneApiAgent
label_desc: Use image node_id 2 for calling the TodWorldSingleBatchTest obj's underlying member method code with example usage: obj.test_roundDataCorrect() without return types