/**
 * A helper, internal data structure that acts as a map but also allows getting / removing
 * elements in the LIFO order
 */
export declare function MdStackedMap(): {
    createNew: () => {
        add: (key: any, value: any) => void;
        get: (key: any) => any;
        keys: () => any[];
        top: () => any;
        remove: (key: any) => any;
        removeTop: () => any;
        length: () => number;
    };
};