add_finalize_notifier

Description:

public void add_finalize_notifier (void* notify_data, ClosureNotify notify_func)

Registers a finalization notifier which will be called when the reference count of this goes down to 0.

Multiple finalization notifiers on a single closure are invoked in unspecified order. If a single call to unref results in the closure being both invalidated and finalized, then the invalidate notifiers will be run before the finalize notifiers.

Parameters:

this	a Closure
notify_data	data to pass to `notify_func`
notify_func	the callback function to register