From Joomla! Documentation
The "API15" namespace is an archived namespace. This page contains information for a Joomla! version which is no longer supported. It exists only as a historical reference, it will not be improved and its content may be incomplete and/or contain broken links.
|get||Get cached data by id and group|
|store||Store the data by id and group|
|remove||Remove a cached data entry by id and group|
|clean||Clean cache for a group given a mode.|
|test||Test to see if the cache storage is available.|
jimport( 'joomla.cache.storage.xcache' );