504     fn size_hint(&self) -> (usize, Option<usize>) {  in size_hint()  method
505         self.inner.size_hint()  in size_hint()
549     fn size_hint(&self) -> (usize, Option<usize>) {  in size_hint()  method
550         self.inner.size_hint()  in size_hint()
597     fn size_hint(&self) -> (usize, Option<usize>) {  in size_hint()  method
598         self.inner.size_hint()  in size_hint()
641     fn size_hint(&self) -> (usize, Option<usize>) {  in size_hint()  method
718     fn size_hint(&self) -> (usize, Option<usize>) {  in size_hint()  method
794     fn size_hint(&self) -> (usize, Option<usize>) {  in size_hint()  method
1713         assert_eq!(iter.size_hint(), (3, Some(3)));  in test_size_hint()
1739         assert_eq!(iter.size_hint(), (3, Some(3)));  in test_mut_size_hint()