Contributor.newBuilder().email("******@****.***").build();

        Model target =
                Model.newBuilder().contributors(Arrays.asList(contributor)).build();

        Model source =
                Model.newBuilder().contributors(Arrays.asList(contributor)).build();

        Model merged = mavenMerger.merge(target, source, true, null);

        assertEquals(1, ((List<?>) pom.getValue("contributors")).size());
        assertEquals("project-contributor", pom.getValue("contributors[1]/name"));
        assertEquals("contributor@", pom.getValue("contributors[1]/email"));
        assertEquals("https://contributor", pom.getValue("contributors[1]/url"));
        assertEquals("contributor", pom.getValue("contributors[1]/organization"));

    }

    public void addDeveloper(Developer developer) {
        getModel().addDeveloper(developer);
    }

    public void setContributors(List<Contributor> contributors) {
        getModel().setContributors(contributors);
    }

    public List<Contributor> getContributors() {
        return getModel().getContributors();
    }

    public void addContributor(Contributor contributor) {

    }

    @Override
    protected void mergeModel_Contributors(
            Model.Builder builder, Model target, Model source, boolean sourceDominant, Map<Object, Object> context) {
        builder.contributors(target.getContributors().isEmpty() ? source.getContributors() : target.getContributors());
    }

    @Override
    protected void mergeModel_MailingLists(