/**
* @return LockManagerGroup
*/
public static function singleton()
{
if (self::$instance == null) {
self::$instance = new self();
self::$instance->initFromGlobals();
}
return self::$instance;
}
/**
* Destroy the singleton instance, so that a new one will be created next
* time singleton() is called.
*/
public static function destroySingleton()
{
self::$instance = null;
}
