code: def __init_subclass__(cls):
      previous = REGISTERED_CODES.get(cls.code)
      assert (
          previous is None
      ), f"{cls} cannot have code {cls.code} already used by {previous}"
      REGISTERED_CODES[cls.code] = cls
  
label_desc: Use image node_id 3 for calling the ManagementOperationFailure obj's underlying member method code with example usage: obj.__init_subclass__(cls) without return types