class ProductConfig {

    public boolean uniqueAttachIds() {
        Set<String> attachIDs = new HashSet<>();
        for (Product product : products) {
            if (!attachIDs.contains(product.getAttachId())) {
                attachIDs.add(product.getAttachId());
            } else {
                return false;
            }
        }
        return true;
    }

    public  ProductConfig(List<Product> userConfig, Collection<DependencySeed> projectSeeds);

}