Method iter

crates/vm/src/types/slot.rs:2086–2088

(_zelf: PyRef<Self>, _vm: &VirtualMachine)

    #[cold]
    fn iter(_zelf: PyRef<Self>, _vm: &VirtualMachine) -> PyResult {
        unreachable!("slot_iter is implemented");
    }

    fn extend_slots(slots: &mut PyTypeSlots) {
        let prev = slots.iter.swap(Some(self_iter));