/**
 * A helper, internal data structure that stores all references attached to key
 */
export declare function MdMultiMap(): {
    createNew: () => {
        entries: () => {
            key: string;
            value: any;
        }[];
        get: (key: any) => any;
        hasKey: (key: any) => boolean;
        keys: () => string[];
        put: (key: any, value: any) => void;
        remove: (key: any, value: any) => void;
    };
};