Give VirtualListVector a lifetime?

[MinusGix]

It would be good to give VirtualListVector a lifetime for the iterator.
Ex:
If we wanted to implement VirtualListVector for [T; N] where T: Clone, it might be desirable to have the iterator not clone the entire array at once in case it is large. So we'd have ItemIterator be std::iter::Copied<std::slice::Iter<'_, T>>.. but we can't specify any lifetime other than static which just won't work.
Ex:
If we wanted to implement VirtualListVector for Vec<T> where T: Clone then we could avoid a whole new heap allocation via letting the iterator hold a reference to it
Similarly, even im::Vector is having to clone the sliced part to an entire new vector when it is used.

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I haven't taken a close look at whether this would cause any problems.
It might also be more desirable to return a &T instead? So a borrowed iterator.