code: def setup_args(cls):
      parser = ParlaiParser(True, False, description="My Description")
      parser.add_argument("--foo", default="defaultvalue")
      parser.add_argument("--bar", default="sneaky", hidden=True)
      return parser
  
imports: import sys
  import unittest
  from unittest.mock import patch
  from parlai.core.params import ParlaiParser
  import parlai.core.script
  import parlai.utils.testing
label_desc: Use image node_id 1 for calling the _TestScript obj's underlying member method code with example usage: obj.setup_args(cls) and returns: parser