in chz/validators.py [0:0]
def _ensure_chz_validators(cls: Any) -> None:
if "__chz_validators__" not in cls.__dict__:
# make a copy of the parent's validators, if any
validators: list[Callable[[object], None]] = []
for base in cls.__bases__:
validators.extend(getattr(base, "__chz_validators__", []))
cls.__chz_validators__ = validators