calculateFreshnessFromExpires
calculateFreshnessFromHeuristic
calculateFreshnessFromMaxAge
calculateFreshnessFromSMaxAge
calculateFreshnessLifetime
canServeStaleAndRevalidate
containsAuthorizationHeader
containsCachableExtension
containsIncompatibleAuthorizationInSharedCache
containsMustRevalidateDirective
containsPrivateResponseDirectiveInSharedCache