public NearCacheConfig setPreloaderConfig(NearCachePreloaderConfig preloaderConfig) {
        this.preloaderConfig = checkNotNull(preloaderConfig, "NearCachePreloaderConfig cannot be null!");
        return this;
    }
@Test(expected = NullPointerException.class)
    public void testSetNearCachePreloaderConfig_whenNull_thenThrowException() {
        config.setPreloaderConfig(null);
    }