how to run some code right AFTER an object has been freed

NodePostDelete.gd

extends Node


func _notification(what: int) -> void:
	if what == Object.NOTIFICATION_PREDELETE:
		# post_delete is a static method, thus it can be called deferredly even by dying objects. Beware that an object can be "saved" from a queue_free call by calling cancel_free, but a free call (instead of queue_free) should kill it imediatly without chance for survival
		post_delete.call_deferred(get_instance_id(), get_path())


static func post_delete(id: int, path: NodePath) -> void:
	print("node with instance id %s and path %s was just deleted" % [id, path])