Proposal for TypeScript Stream Merge with Concurrency

// Stream.Stream<{ _tag: "a"; value: number; } | { _tag: "b"; value: string; }>
const res = mergeStruct({
    a: Stream.make(0),
    b: Stream.make(""),
});

// Stream.Stream<{ _tag: "a"; value: number; } | { _tag: "b"; value: string; }>
const res = mergeStruct({
    a: Stream.make(0),
    b: Stream.make(""),
});