def pushed_obs
import bend-collections@1.0.0.0/src/containers/doubly_linked_list.bend as DoublyLinkedListimport Base
import bend-collections@1.0.0.0/src/containers/types/doubly_linked_list.bend as E
136def pushed_obs(~T: Data, r: DList<T> & E.Handle) -> DList<T> & E.Obs<T>:
137 (s, h) = r
138 (s, E.OHandle{h})