code: def setup(
      self,
      config: Dict,
      chunks: List,
      serializers: Dict[str, Serializer],
  ) -> None:
      super().setup(config, chunks, serializers)
      self._dtype = _TORCH_DTYPES_MAPPING[
          int(config["data_format"][0].split(":")[1])
      ]
      if all(chunk["dim"] is None for chunk in self._chunks):
          raise ValueError("The provided chunks isn't properly setup.")
  
imports: import os
  from abc import ABC, abstractmethod
  from time import sleep
  from typing import Any, Dict, List, Optional, Tuple
  import numpy
  import torch
  from lightning.data.streaming.constants import _TORCH_DTYPES_MAPPING, _TORCH_GREATER_EQUAL_2_1_0
  from lightning.data.streaming.serializers import Serializer
label_desc: Use image node_id 3 for calling the TokensLoader obj's underlying member method code with example usage: obj.setup(config, chunks, serializers) without return types