code: def test_sha256sums(self):
      self._test_all_zoos(callback=self._check_sha256sum)
  
file_path: mmf/tests/configs/test_zoo_urls.py
imports: import re
  import time
  import typing
  import unittest
  from mmf.utils.configuration import load_yaml
  from mmf.utils.download import check_header, DownloadableFile
  from omegaconf import DictConfig, OmegaConf
  from tests.test_utils import skip_if_macos, skip_if_no_network
label_desc: Use image node_id 7 for calling the TestConfigsForKeys obj's underlying member method code with example usage: obj.test_sha256sums() without return types