Type Alias WindowChange

WindowChange:
    | {
        body: BodyName;
        feature: "sign";
        from: ZodiacSign
        | null;
        to: ZodiacSign | null;
    }
    | { feature: "ascendant"
    | "midheaven"; from: ZodiacSign; to: ZodiacSign }
    | {
        body: BodyName;
        feature: "house";
        from: HouseNumber | null;
        to: HouseNumber | null;
    }
    | {
        a: BodyName;
        b: BodyName;
        feature: "aspect";
        from: AspectType
        | null;
        to: AspectType | null;
    }
    | { feature: "house-system"; from: HouseSystem; to: HouseSystem }