docs: public UserManagedCacheBuilder<K, V, T> withValueSerializingCopier() {
      UserManagedCacheBuilder<K, V, T> otherBuilder = new UserManagedCacheBuilder<>(this);
      otherBuilder.valueCopier = null;
      otherBuilder.useValueSerializingCopier = true;
      return otherBuilder;
    }