```
A UniqueList is a List which rejects duplicate elements (recall that the
modification methods on List, add/add/addAll/addAll/set, are permitted
throw IllegalArgumentException if there's anything t…
```
A UniqueList is a List which rejects duplicate elements (recall that the
modification methods on List, add/add/addAll/addAll/set, are permitted
throw IllegalArgumentException if there's anything t…