def METHOD_NAME(original: Dict, new: Dict) -> Dict:
    pid = os.getpid()
    if pid not in PROCESS_MODEL_REGISTRY:
        raise RuntimeError("needs to call init method first")
    model_registry = PROCESS_MODEL_REGISTRY[pid]
    diff_func = DIFF_FUNCS.get(model_registry.config.get_exchange_format(), None)
    if diff_func is None:
        raise RuntimeError("no default params diff function")
    return diff_func(original, new)