@Override
    public V peek() {
        return get(peekAsync());
    }
@Test
    public void testPeek() {
        RTransferQueue<String> queue = redisson.getTransferQueue("queue");
        assertThat(queue.peek()).isNull();

        queue.add("1");

        assertThat(queue.size()).isEqualTo(1);
        assertThat(queue.peek()).isEqualTo("1");
    }