public iteratorWrapper(Iterator<? extends T> iterator, int start, int end) {
BoundedIterator.checkConstraints(start, end);
iter_ = iterator;
for (index_ = 0; iter_.hasNext() && index_ < start; ++index_, iter_.next()) ;
end_ = iter_.hasNext() ? end : index_;
} // iteratorWrapper
listIterator(List<? extends T> list, int start, int end) {
BoundedIterator.checkConstraints(start, end);
list_ = list;
index_ = start;
end_ = end;
if (end_ > list_.size()) end_ = list.size(); // listIterator
}