/* \classmethod af_list() Returns an array of alternate functions available for this pin.  */
STATIC mp_obj_t pin_af_list(mp_obj_t self_in)
/* \classmethod af_list() Returns an array of alternate functions available for this pin.  */
STATIC mp_obj_t pin_af_list(mp_obj_t self_in)
{
        mp_obj_list_append(result, MP_OBJ_FROM_PTR(af));
    }
    return result;
}