export type OptionalPropertyNames<T> = {
    [K in keyof T]-?: object extends {
        [P in K]: T[K];
    } ? K : never;
}[keyof T];
export type SpreadProperties<L, R, K extends keyof L & keyof R> = {
    [P in K]: L[P] | Exclude<R[P], undefined>;
};
export type Id<T> = T extends infer U ? {
    [K in keyof U]: U[K];
} : never;
export type SpreadTwo<L, R> = Id<Pick<L, Exclude<keyof L, keyof R>> & Pick<R, Exclude<keyof R, OptionalPropertyNames<R>>> & Pick<R, Exclude<OptionalPropertyNames<R>, keyof L>> & SpreadProperties<L, R, OptionalPropertyNames<R> & keyof L>>;
export type Spread<A extends readonly [...any]> = A extends [infer L, ...infer R] ? SpreadTwo<L, Spread<R>> : unknown;