Variable Both

Both: <A, B>(args: { left: B; right: A }) => { _tag: "Both"; left: B; right: A } & {
    from: <R, E>(
        right: R,
        left: E,
    ) =>
        | { _tag: "Left"; left: E }
        | { _tag: "Right"; right: R }
        | { _tag: "Both"; left: E; right: R };
}