@Override
    public RankedEntry<V> rankEntry(V o) {
        return get(rankEntryAsync(o));
    }
@Test
    public void testRankEntry() {
        RScoredSortedSet<String> set = redisson.getScoredSortedSet("test");
        set.add(1.1, "v1");
        set.add(1.2, "v2");
        set.add(1.3, "v3");

        RankedEntry<String> v1 = set.rankEntry("v1");
        assertThat(v1.getRank()).isEqualTo(0);
        assertThat(v1.getScore()).isEqualTo(1.1);

        RankedEntry<String> v3 = set.rankEntry("v3");
        assertThat(v3.getRank()).isEqualTo(2);
        assertThat(v3.getScore()).isEqualTo(1.3);

        RankedEntry<String> v4 = set.rankEntry("v4");
        assertThat(v4).isNull();
    }