code: def test_check_good_diff(self):
      locs = check_contents.check_diffs(
          self.bad_cc_hunks,
          prohibited_regex="Make_Unique",
          suppression_regex="OK",
      )
      self.assertEmpty(locs, 0)
  
file_path: tensorflow/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 2 for calling the CheckDiffsTest obj's underlying member method code with example usage: obj.test_check_good_diff() without return types