code: def _setup_dataloader_from_config(
      self, cfg: DictConfig, split: str
  ) -> DataLoader:
      dataset_cfg = self._cfg.dataset
      data_dir = dataset_cfg.data_dir
  
      if not os.path.exists(data_dir):
          raise FileNotFoundError(
              f"Data directory is not found at: {data_dir}."
          )
  
      dataset = DialogueS2SGenerationDataset(
          dataset_split=split,
          dialogues_processor=self.dialogues_processor,
          tokenizer=self.dialogues_processor._tokenizer,
          cfg=dataset_cfg,
      )
  
      dl = torch.utils.data.DataLoader(
          dataset=dataset,
          batch_size=cfg.batch_size,
          collate_fn=dataset.collate_fn,
          drop_last=cfg.drop_last,
          shuffle=cfg.shuffle,
          num_workers=cfg.num_workers,
          pin_memory=cfg.pin_memory,
      )
      return dl
  
imports: import os
  from typing import Dict, Optional, Union
  import numpy
  import torch
  from omegaconf import DictConfig, OmegaConf, open_dict
  from pytorch_lightning import Trainer
  from torch.utils.data import DataLoader
  from transformers import AutoModelForSeq2SeqLM
  from nemo.collections.nlp.data.dialogue import DialogueSGDDataProcessor
  from nemo.collections.nlp.data.dialogue.data_processor.mellon_qa_data_processor import DialogueMellonQADataProcessor
  from nemo.collections.nlp.data.dialogue.data_processor.ms_marco_data_processor import DialogueMSMarcoDataProcessor
  from nemo.collections.nlp.data.dialogue.dataset.dialogue_s2s_generation_dataset import DialogueS2SGenerationDataset
  from nemo.collections.nlp.metrics.dialogue_metrics import DialogueGenerationMetrics
  from nemo.collections.nlp.models.language_modeling.megatron_t5_model import MegatronT5Model
  from nemo.collections.nlp.models.nlp_model import NLPModel
  from nemo.core.classes.common import PretrainedModelInfo
  from nemo.utils import logging
label_desc: Use image node_id 22 for calling the DialogueS2SGenerationModel obj's underlying member method code with example usage: obj._setup_dataloader_from_config(cfg, split) and returns: dl