parent $lock_class object $true_lock_class var $root owners [$true_lock_class] var $root owned [$true_lock_class] var $root manager $true_lock_class var $root writable [$true_lock_class] var $root readable ['parameters, 'methods, 'code] var $root dbref 'true_lock_class method new return <this(), []>; . method try arg lock, obj; return 1; .