code: def no_type_check(memb):
      
      try:
          return typing.no_type_check(memb)
      except(AttributeError):
          _not_type_checked.add(memb)
          return memb
docs: Works like typing.no_type_check, but also supports cases where
      typing.no_type_check fails due to AttributeError. This can happen,
      because typing.no_type_check wants to access __no_type_check__, which
      might fail if e.g. a class is using slots or an object doesn't support
      custom attributes.