@Override
    public double decrementAndGet() {
        return get(decrementAndGetAsync());
    }
@Test
    public void testDecrementAndGet() {
        RAtomicDouble al = redisson.getAtomicDouble("test");
        al.set(19.30);
        assertThat(al.decrementAndGet()).isEqualTo(18.30);
        assertThat(al.get()).isEqualTo(18.30);
    }