class_docstr: Test finding frozen modules.
class_docstr_tok: ["Test","finding","frozen","modules","."]
code: def test_failure(self):
      spec = self.find("<not real>")
      self.assertIsNone(spec)
  
file_path: cpython/Lib/test/test_importlib/frozen/test_finder.py
imports: from test.test_importlib import abc, util
  import os.path
  import unittest
  from test.support import import_helper, REPO_ROOT, STDLIB_DIR
label_desc: Use image node_id 9 for calling the FindSpecTests obj's underlying member method code with example usage: obj.test_failure() without return types