@Override
    public boolean put(K key, V value) {
        return get(putAsync(key, value));
    }
@Test
    public void testReadAllKeySet() {
        RListMultimap<String, String> map = redisson.getListMultimap("test1");
        map.put("1", "4");
        map.put("2", "5");
        map.put("3", "6");

        assertThat(map.readAllKeySet()).containsExactly("1", "2", "3");
    }