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The technique of copy on write minimizes copies by allowing multiple clients to share an object. However, if a client calls a mutator method, then

The technique of "copy on write" minimizes copies by allowing multiple clients to share an object. However, if a client calls a mutator method, then the object is copied just before the mutator is applied. Implement a CopyOnWri tel i st proxy that implements copy on write for li st objects.

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