Registers an invalidation notifier which will be called when the closure is invalidated with Closure.invalidate. Invalidation notifiers are invoked before finalization notifiers, in an unspecified order.
data to pass to notify_func
the callback function to register
Registers an invalidation notifier which will be called when the closure is invalidated with Closure.invalidate. Invalidation notifiers are invoked before finalization notifiers, in an unspecified order.