maybe it should be changed?

https://github.com/VanHakobyan/DesignPatterns/blob/c240fb1b7ebd5b3c8c4b2c33c506fcb1efdd779f/Memento/Man%20and%20Robot/Man.cs#L9
``` c#
 var back = new Backpack(Clothes);
 Clothes = "Naked"; // or null
 return back;
```