import { external } from "https://deno.land/x/stream_observables@v1.3/sources/external.ts";
Utility function to create new observables from external sources.
Returns an object with two values: the new observable, and a next
function
which will emit a value to observable
when called.
Calling next
with EOF
will indicate there are no more values to emit.
Parameters
optional
cancel: ReadableStreamErrorCallback