Method can_designate

plugins/logistics.cpp:258–262

    }

    bool can_designate(color_ostream &out, df::item *item) override {
        if (!melt_masterworks && item->getQuality() >= df::item_quality::Masterful)
            return false;
        return !item->flags.bits.forbid && Items::canMelt(item);
    }

    bool designate(color_ostream &out, df::item *item) override {
        Items::markForMelting(item);