@Override
    public boolean add(String e) {
        return get(addAsync(e));
    }
@Test
    public void testRandom() {
        RLexSortedSet al = redisson.getLexSortedSet("test");
        for (int i = 0; i < 100; i++) {
            al.add("" + i);
        }

        Set<String> values = new HashSet<>();
        for (int i = 0; i < 3; i++) {
            String v = al.random();
            values.add(v);
        }
        assertThat(values).hasSize(3);

        Collection<String> range = al.random(10);
        assertThat(range).hasSize(10);
    }