👉 In computer science, a "unbacked" data structure is one that does not allow any element to be added or removed from itself. In other words, it cannot be used as an additional storage container for another object. For example: ```python class Node: def __init__(self, value): self.value = value self.next = None class LinkedListNode(Node): def __init__(self, value): super().__init__(value) self.prev
