def visit_fold
import bend-collections@1.0.0.0/src/containers/internal/intrusive_list.bend as IntrusiveListimport Base
167def visit_fold(~S: Type, ~V: Data, ~C: Data, ~fn: S -> C -> V -> S, s: S, +c: C, unit: Unit, +v: V) -> S & Unit:
168 (fn(s, c, v), Unit{})