@Override
    public boolean addAll(Collection<? extends String> c) {
        return get(addAllAsync(c));
    }
@Test
    public void testAll() {
        RLexSortedSet set = redisson.getLexSortedSet("simple");
        set.addAll(Arrays.asList("foo", "bar"));
        assertThat(set.contains("foo")).isTrue();
        assertThat(set.contains("bar")).isTrue();
        assertThat(set.contains("123")).isFalse();
    }