code: def load_dummy_dataset():
      # START load_dataset
      import datasets
  
      dataset = datasets.load_dataset(
          "wikitext",
          "wikitext-103-raw-v1",
          split="train+test+validation",
      )
  
file_path: hf-tokenizers/bindings/python/tests/documentation/test_tutorial_train_from_iterators.py
imports: import gzip
  import os
  import datasets
  import pytest
  from ..utils import data_dir, train_files
label_desc: Use image node_id 2 for calling the TestTrainFromIterators obj's underlying member method code with example usage: obj.load_dummy_dataset() without return types