def METHOD_NAME(
    cls,
    k: str,
    v: Union[int, str, Callable, Dict[str, str]],
    setter: Callable,
    vars: Dict = {'handler': None},
):
    if isinstance(v, dict) and 'function' in v:
        v = build_transform(v, filename=f'url:{cls.name}.{k}', vars=vars, iter=False)
    if v is not None:
        setter(v)