@Override
    protected void mergeModel_MailingLists(
            Model target, Model source, boolean sourceDominant, Map<Object, Object> context) {
        if (target.getMailingLists().isEmpty()) {
            target.setMailingLists(new ArrayList<>(source.getMailingLists()));
        }
    }

    @Override
    protected void mergeModelBase_Modules(

                }
                for (Contributor contributor : model.getContributors()) {
                    visit(contributor);
                }
                for (MailingList mailingList : model.getMailingLists()) {
                    visit(mailingList);
                }
                visit(model.getPrerequisites());
                visit(model.getScm());
                visit(model.getIssueManagement());