/**
 * Defines an abstract class with map utilities.
 */
export declare abstract class Maps {
    /**
     * @constructor
     *
     * @private
     */
    private constructor();
    /**
     * Checks whether the given map is empty.
     *
     * @param {Map} map Contains some map.
     * @return {Boolean} whether the given map is empty.
     */
    static isEmpty<TKey, TValue>(map: Map<TKey, TValue>): boolean;
    /**
     * Checks whether the given value is a map.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the given value is a map.
     */
    static isMap(value?: any): value is Map<any, any>;
    /**
     * Checks whether the specified value is a Map iterator.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is a Map iterator.
     */
    static isMapIterator(value?: any): value is IterableIterator<[any, any]>;
    /**
     * Checks whether the given map is not empty.
     *
     * @param {Map} map Contains some map.
     * @return {Boolean} whether the given map is not empty.
     */
    static isNotEmpty<TKey, TValue>(map: Map<TKey, TValue>): boolean;
    /**
     * Checks whether the specified value is of type `WeakMap`.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is of type `WeakMap`.
     */
    static isWeakMap(value?: any): value is WeakMap<any, any>;
    /**
     * Converts a map to an object.
     *
     * @param {Map} map Contains some map.
     * @return {Object} the object whose property keys and values are the
     * key-value pairs of the map.
     */
    static toObject<U extends string | number | symbol, V>(map: Map<U, V>): Record<U, V>;
    /**
     * Converts a map to a set.
     *
     * @param {Map} map Contains some map.
     * @return {Set} a set.
     */
    static toSet<U, V>(map: Map<U, V>): Set<V>;
}