49     pub fn insert(&mut self, item: Range<u64>) {  in insert()
93     pub fn remove_until(&mut self, largest: u64) {  in remove_until()
110     pub fn push_item(&mut self, item: u64) {  in push_item()
115     pub fn first(&self) -> Option<u64> {  in first()
119     pub fn last(&self) -> Option<u64> {  in last()
141     fn prev_to(&self, item: u64) -> Option<Range<u64>> {  in prev_to()
148     fn next_to(&self, item: u64) -> Option<Range<u64>> {  in next_to()
205     fn next(&mut self) -> Option<Range<u64>> {  in next()
212     fn next_back(&mut self) -> Option<Range<u64>> {  in next_back()
233     fn next(&mut self) -> Option<u64> {  in next()
249     fn next_back(&mut self) -> Option<u64> {  in next_back()
263 fn range_overlaps(r: &Range<u64>, other: &Range<u64>) -> bool {  in range_overlaps()