class ChecklistExporter {

    static <E, U extends Collection<E>> BinaryOperator<U> addToLeft() {
        return (left, right) -> {
            left.addAll(right);
            return left;
        };
    }

    private  ChecklistExporter(final List<Op> operations,
                              final List<String> exportTypeDefs,
                              final List<Rule> pathScopes,
                              final List<Rule> nodeTypeFilters,
                              final List<JcrNs> jcrNamespaces);

}