def obs_unit
import bend-collections@1.0.0.0/src/containers/internal/dlist_storage.bend as DlistStorageimport Base
import bend-collections@1.0.0.0/src/containers/types/internal_dlist.bend as E
470def obs_unit(~T: Data, r: DList<T> & Result<&2, &2, E.Error, Unit>) -> DList<T> & E.Obs<T>:
471 (s, x) = r
472 (s, E.OUnit{x})