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# ->initialize()
 -  takes a sfCache object as its second argument
# ->generateCacheKey
 -  creates a simple cache key from an internal URI
 -  can take a hostName as second parameter
 -  can take a serialized set of vary headers as third parameter
 -  includes request parameters as key/value pairs
 -  reorders request parameters alphabetically
 -  throws an sfException when passed an internal URI with a rule
 -  does not throw an sfException when passed an internal URI with a @sf_cache_partial rule
 -  throws an sfException when passed an internal URI with a @sf_cache_partial rule with no module or action param
 -  can deal with internal URIs to partials
 -  can deal with internal URIs to contextual partials
 -  can take a prefix for contextual partials as fourth parameter
 -  creates a directory friendly vary cache key
# ->generateNamespace()
# ->addCache()
 -  register a cache configuration for an action
 -  register a cache configuration for an action
# ->set()
 -  returns false if the action is not cacheable
 -  returns true if the action is cacheable
 -  stores the first parameter in a key computed from the second parameter
 -  works with URIs with parameters
 -  stores a different version for each set of parameters
 -  stores a different version for each set of parameters
 -  accepts keys to partials
 -  accepts keys to contextual partials
# ->get()
 -  returns null if the action is not cacheable
 -  returns the saved content if the action is cacheable
# ->has()
 -  returns false if the action is not cacheable
 -  returns the cache does not exist for the action
 -  returns true if the action is in cache
# ->remove()
 -  removes cache content for an action
 -  removes accepts an internal URI as first parameter
 -  does not remove cache content for keys not matching the internal URI
 -  accepts wildcards in URIs and then removes all keys matching the pattern
 -  accepts wildcards in URIs and then removes all keys matching the pattern
 -  accepts wildcards in URIs and lets keys not matching the pattern unchanged
# Cache key generation options
 -  uses  option to know if vary headers changes cache key.
 -  uses  option to know if vary headers changes cache key.
 -  allows the use of both  and  options.
 -  prevents directory traversal
 -  prevents directory traversal
# ->getCurrentCacheKey()
 -  appends GET parameters to an existing query string
 -  adds a query string of GET parameters if none is there
# Looks like everything went fine.