code: def dataset(self):
      return self.data_loader.dataset
  
imports: from __future__ import annotations
  import pickle
  import types
  import warnings
  from functools import partial
  from typing import TYPE_CHECKING, Any, Callable
  import numpy
  import torch
  import torch.nn
  from torch.optim import Optimizer
  from torch.serialization import DEFAULT_PROTOCOL
  from torch.utils.data import DataLoader
  from monai.networks.utils import eval_mode
  from monai.optimizers.lr_scheduler import ExponentialLR, LinearLR
  from monai.utils import StateCacher, copy_to_device, optional_import
label_desc: Use image node_id 2 for calling the DataLoaderIter obj's underlying member method code with example usage: obj.dataset() and returns: self