code: def setUp(self):
      super().setUp()
  
      # Reset variables.
      global _OUTPUT_VAR_ONE
      global _OUTPUT_VAR_TWO
      _OUTPUT_VAR_ONE = None
      _OUTPUT_VAR_TWO = None
  
imports: from __future__ import annotations
  import sys
  from unittest import mock
  from absl.testing import absltest
  from google.generativeai.notebook import argument_parser
  from google.generativeai.notebook import cmd_line_parser
  from google.generativeai.notebook import model_registry
  from google.generativeai.notebook import parsed_args_lib
  from google.generativeai.notebook import post_process_utils
  from google.generativeai.notebook.lib import llm_function
  from google.generativeai.notebook.lib import llmfn_output_row
  from google.generativeai.notebook.lib import llmfn_outputs
  from google.generativeai.notebook.lib import model
label_desc: Use image node_id 1 for calling the CmdLineParserTestBase obj's underlying member method code with example usage: obj.setUp() without return types