def contains_found
import bend-collections@1.0.0.0/src/containers/balanced_search_tree.bend as BalancedSearchTreeimport Base
303def contains_found(~K: Data, ~V: Data, ~cmp: K -> K -> Cmp, r: TreeMap<K, V, cmp> & Search) -> TreeMap<K, V, cmp> & Bool:
304 (m, Search{id, p, left}) = r
305 (m, Nat.is_lt(0n, id))