@property
        def type_(self) -> Any:
            return self.field_info.annotation

        def __post_init__(self) -> None:
            self._type_adapter: TypeAdapter[Any] = TypeAdapter(
                Annotated[self.field_info.annotation, self.field_info]
            )

        def get_default(self) -> Any:
            if self.field_info.is_required():
                return Undefined