def copy_key
import bend-collections@1.0.0.0/src/containers/balanced_search_tree.bend as BalancedSearchTreeimport Base
1193def copy_key(~K: Data, ~V: Data, ~cmp: K -> K -> Cmp, m: TreeMap<K, V, cmp>, +target: Nat, +node: Node<K>) -> TreeMap<K, V, cmp>:
1194 match node:
1195 case Free{next}:
1196 m
1197 case N{c, l, r, p, k}:
1198 set_key(~K, ~V, ~cmp, m, target, k)