@Override
    public Set<V> readDiff(String... names) {
        return get(readDiffAsync(names));
    }
@Test
    public void testReadDiff() {
        RSet<Integer> set = redisson.getSet("set");
        set.add(5);
        set.add(7);
        set.add(6);
        RSet<Integer> set1 = redisson.getSet("set1");
        set1.add(1);
        set1.add(2);
        set1.add(5);
        RSet<Integer> set2 = redisson.getSet("set2");
        set2.add(3);
        set2.add(4);
        set2.add(5);

        assertThat(set.readDiff("set1", "set2")).containsOnly(7, 6);
        assertThat(set).containsOnly(6, 5, 7);
    }