Function collections::btree::map::last_leaf_edge

fn last_leaf_edge<BorrowType, K, V>(node: NodeRef<BorrowType, K, V, LeafOrInternal>) -> Handle<NodeRef<BorrowType, K, V, Leaf>, Edge>

Unstable (collections #27783)

: library is unlikely to be stabilized with the current layout and name, use std::collections instead