SimpleMerge

type SimpleMerge<Destination, Source> = Simplify<
    {
        [Key in keyof Destination as Key extends keyof Source
            ? never
            : Key]: Destination[Key];
    } & Source
>;

type SimpleMerge<Destination, Source> = Simplify<
    {
        [Key in keyof Destination as Key extends keyof Source
            ? never
            : Key]: Destination[Key];
    } & Source
>;