public void sort(Comparator<P> comparator) {
List<P> positions = getPositions();
@SuppressWarnings({"SuspiciousToArrayCall", "unchecked"})
P[] sorted = (P[]) positions.toArray(new BaseNavigationPosition[positions.size()]);
Arrays.sort(sorted, comparator);
//noinspection unchecked
order(asList(sorted));
}
