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) {
        getModel().addContributor(contributor);

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

        assertEquals(1, merged.getContributors().size(), "Expected exactly 1 contributor");
        assertTrue(
                merged.getContributors().contains(contributor),
                "Expected contributors to contain " + contributor + " but was " + merged.getContributors());
    }

    @Test
    void mergeSameDependencies() {