import { ObjectId } from 'mongodb';
export type ID = string | ObjectId;
export type LinkedWithParent<T, U> = T & {
    getParent: () => U;
};
export declare function assertObjectID(id: ID, error?: Error): ObjectId;
export declare function attachParent<T extends object, U>(target: T, parent: U): LinkedWithParent<T, U>;
export declare function attachMatchingParent<S extends object, P extends object>(sources: S[], sourceKey: keyof S, parents: P[], parentKey?: keyof P): LinkedWithParent<S, P | null>[];
export declare function attachMatchingParent<S extends object, P extends object>(sources: S[], sourceKey: keyof S, parents: P[], throwErrorIfNotFound: true): LinkedWithParent<S, P>[];
export declare function attachMatchingParent<S extends object, P extends object>(sources: S[], sourceKey: keyof S, parents: P[], parentKey: keyof P, throwErrorIfNotFound: true): LinkedWithParent<S, P>[];