code: def add_ray_specific_args(parser):
      # Ray cluster address.
      parser.add_argument(
          "--ray-address",
          default="auto",
          type=str,
          help=(
              "The address of the Ray cluster to connect to. If not "
              "specified, Ray will attempt to automatically detect the "
              "cluster. Has no effect if pytorch is used as the distributed "
              "retriever."
          ),
      )
      parser.add_argument(
          "--num_retrieval_workers",
          type=int,
          default=1,
          help=(
              "The number of retrieval actors to use when Ray is selected "
              "for the distributed retriever. Has no effect when "
              "distributed_retriever is set to pytorch."
          ),
      )
      return parser
  
imports: import argparse
  import logging
  import os
  import sys
  import time
  from collections import defaultdict
  from pathlib import Path
  from typing import Any, Dict, List, Tuple
  import numpy
  import pytorch_lightning
  import torch
  import torch.distributed
  import torch.distributed
  from pytorch_lightning.plugins.training_type import DDPPlugin
  from torch.utils.data import DataLoader
  from transformers import AutoConfig, AutoTokenizer, BartForConditionalGeneration, BatchEncoding, RagConfig, RagSequenceForGeneration, RagTokenForGeneration, RagTokenizer, T5ForConditionalGeneration
  from transformers import logging
  from transformers.integrations import is_ray_available
  from callbacks_rag import get_checkpoint_callback, get_early_stopping_callback, Seq2SeqLoggingCallback
  from distributed_pytorch_retriever import RagPyTorchDistributedRetriever
  from utils_rag import calculate_exact_match, flatten_list, get_git_info, is_rag_model, lmap, pickle_save, save_git_info, save_json, set_extra_model_params, Seq2SeqDataset
  from lightning_base import BaseTransformer, add_generic_args, generic_train
label_desc: Use image node_id 22 for calling the GenerativeQAModule obj's underlying member method code with example usage: obj.add_ray_specific_args(parser) and returns: parser