class_docstr: Test Re-ranker Functionality.
class_docstr_tok: ["Test","Re-ranker","Functionality","."]
code: def _setup_parser(self) -> Opt:
      from projects.light_whoami.agents.rpa_rerank import RPAReranker
  
      parser = ParlaiParser(True, True)
      parser = RPAReranker.add_cmdline_args(parser, {})
      parser = TorchRankerAgent.add_cmdline_args(parser, {})
      opt = parser.parse_args(["--predictor-model-file", RPA_RERANKER])
      return opt
  
imports: import unittest
  from parlai.core.message import Message
  from parlai.core.params import ParlaiParser, Opt
  from parlai.core.torch_ranker_agent import TorchRankerAgent
  import parlai.utils.testing
  from projects.light_whoami.agents import RPA_RERANKER, RPA_RERANKER_AUTO_EXPANDED, VANILLA_128, VANILLA_1024, UL_128, UL_1024, MULTIOBJECTIVE, PROFILE_EXPANDED_128, PROFILE_EXPANDED_1024, AUTO_EXPANDED_1024, EXPANDED_AND_MULTIOBJECTIVE_1024, TEST_RPA_RERANKER
label_desc: Use image node_id 1 for calling the TestReranker obj's underlying member method code with example usage: obj._setup_parser() and returns: opt