f.ingrediens = ings.toOwnedSlice();

    f.ingrediens = try ings.toOwnedSlice();

            try rules.append(rule.toOwnedSlice());

            try rules.append(try rule.toOwnedSlice());

        try m.rules.put(rule_no, rules.toOwnedSlice());

        try m.rules.put(rule_no, try rules.toOwnedSlice());

    data.ranges = ranges.toOwnedSlice();

    data.ranges = try ranges.toOwnedSlice();

    data.tickets = tickets.toOwnedSlice();

    data.tickets = try tickets.toOwnedSlice();

    ret.buses = bus_array.toOwnedSlice();

    ret.buses = try bus_array.toOwnedSlice();