def set_root
import bend-collections@1.0.0.0/src/containers/balanced_search_tree.bend as BalancedSearchTreeimport Base
251def set_root(~K: Data, ~V: Data, ~cmp: K -> K -> Cmp, m: TreeMap<K, V, cmp>, +root: Nat) -> TreeMap<K, V, cmp>:
252 TM{n, old, lo, hi, free, nodes, payloads} = m
253 TM{n, root, lo, hi, free, nodes, payloads}