switch (FEAT_TRAINS, SELF, box_car_antelope_gen_1_1_switch_cargo_capacity_by_cargo_1, cargo_classes & bitmask(CC_PASSENGERS, CC_MAIL, CC_ARMOURED)) {
        bitmask(CC_PASSENGERS): return 0;
        bitmask(CC_MAIL): return 110;
        bitmask(CC_ARMOURED): return 110;
        return 55;
    }