The possibility to have multiple cache rules in a cache
configuration file is now handled throughout the cache
filter.
The major difference is that while you earlier directly
queried the Cache whether data should be stored to the
cache and whether data in the cache should be used, you
now query the Cache whether data should be stored to the
cache and, if so, get a CacheRules object from which you
subsequently query whether data from the cache should
be used.
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