116     pub fn iter_mut(&mut self) -> IterMut<T> {  in iter_mut()
117         IterMut {  in iter_mut()
515     type IntoIter = IterMut<'a, T>;
584     inner: slice::IterMut<'a, (T, P)>,
827 pub struct IterMut<'a, T: 'a> {  struct
837     inner: slice::IterMut<'a, (T, P)>,
842 pub(crate) fn empty_punctuated_iter_mut<'a, T>() -> IterMut<'a, T> {  in empty_punctuated_iter_mut()
843     IterMut {  in empty_punctuated_iter_mut()
848 impl<'a, T> Iterator for IterMut<'a, T> {  implementation
860 impl<'a, T> DoubleEndedIterator for IterMut<'a, T> {  implementation
866 impl<'a, T> ExactSizeIterator for IterMut<'a, T> {  implementation