def obs_item
import bend-collections@1.0.0.0/src/containers/binary_heap.bend as BinaryHeapimport Base
import bend-collections@1.0.0.0/src/containers/types/binary_heap.bend as E
383def obs_item(~A: Data, r: Heap<A> & Result<&2, &2, E.Error, A>) -> Heap<A> & E.Obs<A>:
384 (h, x) = r
385 (h, E.OItem{x})