export declare class Map<T> {
    private _items;
    private _size;
    constructor();
    /**
     * Populates this map with the corresponding values
     * in the given object.
     * @param {any} from [description]
     */
    populate(from: any): void;
    /**
     * Seeds the values in the given object with the
     * corresponding values in this map.
     * @param {any} to [description]
     */
    seed(to: any): void;
    /**
     * Iterates over each item in the map, skipping
     * any entries whose key is null.
     * @param {Function} predicate A function to call on each iteration
     */
    forEach(predicate: Function): void;
}