public static void qsort(Object[] a, Comparator comp) {
        qsort(a, 0, a.length - 1, comp);
    }
Quick sorts the supplied array using the specified comparator.

@param a the array to sort (not null, modified)
@param comp the Comparator to use (not null)
jme3-core/src/main/java/com/jme3/util/SortUtil.java