We are currently upgrading our plugins to work with sbs 4.5.1. We ran into a problem trying to update our beans. Previously they use to use com.jivesoftware.community.cache.Cacheable and com.tangosol.io.ExternalizableLite. These are no longer available. What is the new way to do caching in plugins? Is there any documentation for the new way, or any example code that I can look at?