code: def iter_content(self, chunk_size):
      del chunk_size
      for line in self.raw:
          yield line
  
imports: import hashlib
  import io
  import os
  import tempfile
  from typing import Optional
  from unittest import mock
  import pytest
  import tensorflow
  from tensorflow_datasets import testing
  from tensorflow_datasets.core.download import downloader
  from tensorflow_datasets.core.download import resource
  from tensorflow_datasets.core.download import util
label_desc: Use image node_id 4 for calling the _FakeResponse obj's underlying member method code with example usage: obj.iter_content(chunk_size) without return types