validateString("name", model.getName());
            validateString("description", model.getDescription());
            validateString("url", model.getUrl());

            validateCollection("licenses", model.getLicenses(), v -> {
                validateString("licenses.name", v.getName());
                validateString("licenses.url", v.getUrl());
            });

            validateCollection("developers", model.getDevelopers(), v -> {

        if (prerequisites != null) {
            properties.put("prerequisites.maven", prerequisites.getMaven());
        }

        List<License> licenses = model.getLicenses();
        properties.put("license.count", licenses.size());
        for (int i = 0; i < licenses.size(); i++) {
            License license = licenses.get(i);