code: def _get_dataloaders_dict(
      self, first_dataloader: DataLoader, second_dataloader: DataLoader
  ) -> Dict[str, Union[DataLoader, Iterable[object]]]:
      return {"1": first_dataloader, "2": second_dataloader}
  
imports: import random
  import unittest
  from collections import Counter
  from typing import Any, cast, Dict, Iterable, Iterator, List, Mapping, Union
  import torch
  from torch.utils.data import DataLoader, Dataset
  from torchtnt.utils.data.iterators import AllDatasetBatches, DataIterationStrategy, InOrder, MultiIterator, RandomizedBatchSampler, RoundRobin, StoppingMechanism
  from torchtnt.utils.data.multi_dataloader import MultiDataLoader
label_desc: Use image node_id 15 for calling the TestMultiDataLoader obj's underlying member method code with example usage: obj._get_dataloaders_dict(first_dataloader, second_dataloader) and returns: dict