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static <A, B> Comparator<A> mapComparatorDesc(final Map<A, B> map) {
  ret new Comparator<A>() {
    public int compare(A a, A b) {
      ret cmp(map.get(b), map.get(a));
    }
  };
}
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Created: 2017-03-26 11:59:06

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