code: def iter_content(self, **kwargs):
      return [bytes(CONTENT, "utf-8")]
  
file_path: datasets/tests/test_download_manager.py
imports: import json
  import os
  from pathlib import Path
  import pytest
  from datasets.download.download_config import DownloadConfig
  from datasets.download.download_manager import DownloadManager
  from datasets.utils.file_utils import hash_url_to_filename
label_desc: Use image node_id 1 for calling the MockResponse obj's underlying member method code with example usage: obj.iter_content() and returns: list