Another round of FindBugs fixes. Should be static inner class.
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@ -434,7 +434,7 @@ public class MannWhitneyU {
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* A comparator class which uses dithering on tie-breaking to ensure that the internal treeset drops no values
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* and to ensure that rank ties are broken at random.
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*/
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private class DitheringComparator implements Comparator<Pair<Number,USet>> {
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private static class DitheringComparator implements Comparator<Pair<Number,USet>> {
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public DitheringComparator() {}
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