public void setLocalTaskQueueCapacity(int localTaskQueueCapacity) {
        this.localTaskQueueCapacity = checkPositive(localTaskQueueCapacity, "localTaskQueueCapacity");
    }
@Test
    public void test_setLocalTaskQueueCapacity_whenNegative() {
        ReactorBuilder builder = newBuilder();
        assertThrows(IllegalArgumentException.class, () -> builder.setLocalTaskQueueCapacity(-1));
    }