export interface ExtraObjectOptions {
    weekType: boolean;
    deep: boolean;
}
export declare type ObjectExtraOptions = Partial<ExtraObjectOptions>;
export interface ObjectReduceOptions<T> {
    accumulator: T;
    key: string;
    targetValue: T;
    options: ObjectExtraOptions;
}
export declare type ComparableKeys<T> = T | T[] | string;
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