`yf_cache_driver` abstract class

YF Cache driver abstract.

File	`plugins/cache/classes/cache/yf_cache_driver.class.php`
Use	`_class('cache_driver', 'classes/cache/')`

Public properties

A site sets them in its config with $PROJECT_CONF['cache_driver']['NAME'] = ...;

Property	Default	Description
`$_parent`	`null`
`$implemented`	`[]`

None without a leading underscore.