docs: public UserManagedCacheBuilder<K, V, T> withValueSerializer(Serializer<V> valueSerializer) {
      if (valueSerializer == null) {
        throw new NullPointerException("Null value serializer");
      }
      UserManagedCacheBuilder<K, V, T> otherBuilder = new UserManagedCacheBuilder<>(this);
      otherBuilder.valueSerializer = valueSerializer;
      return otherBuilder;
    }