import { forkJoin } from "https://deno.land/x/stream_observables@v1.3/combiners/mod.ts";
When all observables complete, emit the last emitted value from each.
Parameters
o1: Observable<T1>
Observables to combine.
o2: Observable<T2>
Returns
Observable<[T1, T2]>
Observable that emits a tuple of the last item emitted by each observable.