341 pub struct RBTree<K: Ord, V> {  struct
347 impl<K: Ord, V> Drop for RBTree<K, V> {  argument
355 impl<K: Ord + Clone, V: Clone> Clone for RBTree<K, V> {  implementation
366 impl<K, V> Debug for RBTree<K, V>  implementation
377 impl<K: Ord + Debug, V: Debug> RBTree<K, V> {  implementation
413 impl<K, V> PartialEq for RBTree<K, V>  implementation
428 impl<K, V> Eq for RBTree<K, V>  implementation
435 impl<'a, K, V> Index<&'a K> for RBTree<K, V>  implementation
447 impl<K: Ord, V> FromIterator<(K, V)> for RBTree<K, V> {  implementation
456 impl<K: Ord, V> Extend<(K, V)> for RBTree<K, V> {  implementation
817 impl<K: Ord, V> IntoIterator for RBTree<K, V> {  implementation
841 impl<K: Ord, V> RBTree<K, V> {  impl