class_docstr: A class to track record of every temporary files created by the tests.
code: def cleanup(cls):
      while cls.tmp_files:
          file = cls.tmp_files.pop()
          if os.path.isfile(file):
              os.remove(file)
      while cls.tmp_folders:
          folder = cls.tmp_folders.pop()
          shutil.rmtree(folder)
  
imports: import shutil
  import os
label_desc: Use image node_id 3 for calling the TmpFileManager obj's underlying member method code with example usage: obj.cleanup(cls) without return types