@Override
    public void clear(long fromIndex, long toIndex) {
        get(clearAsync(fromIndex, toIndex));
    }
@Test
    public void testClear() {
        RBitSet bs = redisson.getBitSet("testbitset");
        bs.set(0, 8);
        bs.clear(0, 3);
        assertThat(bs.toString()).isEqualTo("{3, 4, 5, 6, 7}");
    }