record

Records that you are now using this IndexSearcher. Always call this when you've obtained a possibly new IndexSearcher, for example from SearcherManager. It's fine if you already passed the same searcher to this method before.

This returns the long token that you can later pass to [acquire] to retrieve the same IndexSearcher. You should record this long token in the search results sent to your user, such that if the user performs a follow-on action (clicks next page, drills down, etc.) the token is returned.