code: def setUpClass(cls):
      super().setUpClass()
  
      base_path = "third_party/xla/build_tools/lint"
      with open(f"{base_path}/testdata/bad_cc.diff") as f:
          cls.bad_cc_hunks = diff_parser.parse_hunks(f.read())
  
      with open(f"{base_path}/testdata/important_cc.diff") as f:
          cls.important_cc_hunks = diff_parser.parse_hunks(f.read())
  
file_path: tensorflow-upstream/third_party/xla/build_tools/lint/check_contents_test.py
imports: from absl.testing import absltest
  from xla.build_tools.lint import check_contents
  from xla.build_tools.lint import diff_parser
label_desc: Use image node_id 1 for calling the CheckDiffsTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types