code: def _get_dataloader(self, dataset):
      return DataLoader(dataset=dataset, batch_size=4, num_workers=0)
  
file_path: mmf/tests/datasets/test_multi_dataset_loader.py
imports: import unittest
  from collections import Counter
  import numpy
  import torch
  from mmf.common.registry import registry
  from mmf.datasets.multi_dataset_loader import MultiDatasetLoader
  from omegaconf import OmegaConf
  from torch.utils.data import DataLoader
  from ..test_utils import NumbersDataset
label_desc: Use image node_id 3 for calling the TestMultiDatasetLoader obj's underlying member method code with example usage: obj._get_dataloader(dataset) and returns: DataLoader