Dependency source,
            boolean sourceDominant,
            Map<Object, Object> context) {
        // don't merge
    }

    @Override
    protected void mergeModel_Contributors(
            Model.Builder builder, Model target, Model source, boolean sourceDominant, Map<Object, Object> context) {
        // don't merge
    }

    @Override
    protected void mergeModel_Developers(

        if (target.getDevelopers().isEmpty()) {
            target.setDevelopers(new ArrayList<>(source.getDevelopers()));
        }
    }

    @Override
    protected void mergeModel_Contributors(
            Model target, Model source, boolean sourceDominant, Map<Object, Object> context) {
        if (target.getContributors().isEmpty()) {

        mergeModel_MailingLists(target, source, sourceDominant, context);
        mergeModel_Developers(target, source, sourceDominant, context);
        mergeModel_Contributors(target, source, sourceDominant, context);
        mergeModel_IssueManagement(target, source, sourceDominant, context);
        mergeModel_Scm(target, source, sourceDominant, context);