/**
* Set storage
*
* It unset the storage if $storage is null.
*
* @param IStorage $storage
*/
public static function setStorage($storage)
{
self::$storage = $storage;
}
/**
* Use master key or not
*
* @param bool $flag
* @return void
*/
public static function useMasterKey(bool $flag)
{
self::$useMasterKey = $flag ? true : false;
}
