@Override
    public V removeRandom() {
        return get(removeRandomAsync());
    }
@Test
    public void testRemoveRandom() {
        RSet<Integer> set = redisson.getSet("simple");
        set.add(1);
        set.add(2);
        set.add(3);

        assertThat(set.removeRandom()).isIn(1, 2, 3);
        assertThat(set.removeRandom()).isIn(1, 2, 3);
        assertThat(set.removeRandom()).isIn(1, 2, 3);
        assertThat(set.removeRandom()).isNull();
    }