Support persistence of Hibernate Search/Lucene indexes

I'm able to use Infinispan for my HIbernate Search/Lucene indexes without any issues on Wildfly 10.0.Final with infinispan-directory-provider and lucene-directory 8.1.0 final deployed as modules. However, I need to persist the indexes to disk and when I add a file-store directive to my configuration, I get a NotSerializableException for org.infinispan.lucene.FileListCacheKey. I haven't gotten past this exception, so I don't know if this is as simple as implementing Serializable on FileListCacheKey or not.