docs: public UserManagedCacheBuilder<K, V, T> withLoaderWriter(CacheLoaderWriter<K, V> loaderWriter) {
      if (loaderWriter == null) {
        throw new NullPointerException("Null loaderWriter");
      }
      UserManagedCacheBuilder<K, V, T> otherBuilder = new UserManagedCacheBuilder<>(this);
      otherBuilder.cacheLoaderWriter = loaderWriter;
      return otherBuilder;
    }