def obs_insert
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
462def obs_insert(~T: Data, r: DList<T> & Result<&2, &2, E.Error, E.Handle>) -> DList<T> & E.Obs<T>:
463 (s, x) = r
464 (s, E.OInsert{x})