code: def _create_dataset(self, dataset_type):
      dataset_builder = MMFDatasetBuilder(
          "vqa", functools.partial(SimpleMMFDataset, num_examples=100)
      )
      return dataset_builder.load(self.config, dataset_type)
  
imports: import functools
  import os
  import unittest
  from unittest.mock import MagicMock
  import torch
  from mmf.datasets.base_dataset import BaseDataset
  from mmf.datasets.mmf_dataset_builder import MMFDatasetBuilder
  from mmf.utils.general import get_current_device
  from omegaconf import OmegaConf
label_desc: Use image node_id 5 for calling the TestMMFDatasetBuilder obj's underlying member method code with example usage: obj._create_dataset(dataset_type) and returns: dataset_builder