def obs_list
import bend-collections@1.0.0.0/src/containers/queue.bend as Queueimport Base
import bend-collections@1.0.0.0/src/containers/types/queue.bend as E
62def obs_list(~T: Data, r: Queue<T> & List<&2, T>) -> Queue<T> & E.Obs<T>:
63 (q, xs) = r
64 (q, E.OList{xs})