code: def add_cmdline_args(
      cls, parser: ParlaiParser, partial_opt: Optional[Opt] = None
  ) -> ParlaiParser:
      RpaUlAgent.add_cmdline_args(parser, partial_opt)
      TransformerVariantAgent.add_cmdline_args(parser, partial_opt)
      return parser
  
imports: from typing import Optional, List, Tuple
  from parlai.core.params import ParlaiParser
  from parlai.core.opt import Opt
  from parlai.core.torch_agent import Batch
  import torch
  import torch.nn
  import torch.nn.functional
  from parlai.agents.transformer.transformer import TransformerGeneratorAgent
  from parlai.core.torch_agent import Output
  from parlai.core.metrics import AverageMetric
  from projects.light_whoami.agents.rpa_rerank import RPAReranker
  from projects.msc.agents.long_tga import TransformerVariantAgent
label_desc: Use image node_id 1 for calling the LongRpaUlAgent obj's underlying member method code with example usage: obj.add_cmdline_args(cls, parser, partial_opt) and returns: parser