public static <C extends Comparable<? super C>>
	Collector<C, ?, ParetoFront<C>> toParetoFront() {
		return toParetoFront(Comparator.naturalOrder());
	}
Return a pareto-front collector. The natural order of the elements is
used as pareto-dominance order.

@param <C> the element type
@return a new pareto-front collector
jenetics.ext/src/main/java/io/jenetics/ext/moea/ParetoFront.java