@Override
    public Integer revRank(V o) {
        return get(revRankAsync(o));
    }
@Test
    public void testRevRank() {
        RScoredSortedSet<String> set = redisson.getScoredSortedSet("simple");
        set.add(0.1, "a");
        set.add(0.2, "b");
        set.add(0.3, "c");
        set.add(0.4, "d");
        set.add(0.5, "e");
        set.add(0.6, "f");
        set.add(0.7, "g");

        assertThat(set.revRank("f")).isEqualTo(1);
        assertThat(set.revRank("abc")).isNull();
    }