code: public VersionedCache createVersionedCache(@Nullable EntryImpl<? extends ExtractionNamespace> entryId, String version)
    {
      updatesStarted.incrementAndGet();
      return new VersionedCache(String.valueOf(entryId), version);
    }
docs: This method should be used from {@link CacheGenerator#generateCache} implementations, to obtain a {@link
  VersionedCache} to be returned.
  
  @param entryId an object uniquely corresponding to the {@link CacheScheduler.Entry}, for which VersionedCache is
  created
  @param version version, associated with the cache