public QueryCacheConfig setDelaySeconds(int delaySeconds) {
        this.delaySeconds = checkNotNegative(delaySeconds, "delaySeconds");
        return this;
    }
@Test(expected = IllegalArgumentException.class)
    public void testSetDelaySeconds_throwsException_whenNegative() {
        QueryCacheConfig config = new QueryCacheConfig();
        config.setDelaySeconds(-1);
    }