def attach_unit
import bend-collections@1.0.0.0/src/containers/dlist_iterator.bend as DlistIteratorimport Base
import bend-collections@1.0.0.0/src/containers/doubly_linked_list.bend as D
200def attach_unit(~T: Data, s: D.DList<T>, m: Move<Unit>) -> Iterator<T> & Result<&2, &2, Error, Unit>:
201 M{n, last, f, i, out} = m
202 (IT{s, n, last, f, i}, out)