10 use std::collections::btree_map::{Iter as BTreeIter, IterMut as BTreeIterMut,
15 use alloc::collections::btree_map::{Iter as BTreeIter, IterMut as BTreeIterMut,
398     pub fn iter_mut(&mut self) -> IterMut<K, V> {  in iter_mut()
401                 IterMut::Borrowed(pairs.iter_mut()),  in iter_mut()
404                 IterMut::Owned(map.iter_mut()),  in iter_mut()
449 pub enum IterMut<'a, K: 'a, V: 'a> {  enum
451     Borrowed(slice::IterMut<'a, Option<(K, V)>>),
457 impl<'a, K: Ord + 'a, V: 'a> Iterator for IterMut<'a, K, V> {  implementation
462             &mut IterMut::Borrowed(ref mut iter) =>  in next()
469             &mut IterMut::Owned(ref mut iter) =>  in next()
476             &IterMut::Borrowed(ref iter) => {  in size_hint()
481             &IterMut::Owned(ref iter) =>  in size_hint()