/**
 * Defines an abstract class with set utilities.
 */
export declare abstract class Sets {
    /**
     * @constructor
     *
     * @private
     */
    private constructor();
    /**
     * Checks whether the given set is empty.
     *
     * @param {Set} value Contains some set.
     * @return {Boolean} whether the given set is empty.
     */
    static isEmpty<T>(value: Set<T>): boolean;
    /**
     * Checks whether the given set is not emtpy.
     *
     * @param {Set} value Contains some set.
     * @return {Boolean} whether the given set is not emtpy.
     */
    static isNotEmpty<T>(value: Set<T>): boolean;
    /**
     * Checks whether the given value is a set.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the given value is a set.
     */
    static isSet(value?: any): value is Set<any>;
    /**
     * Checks whether the specified value is a Set iterator.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the specified value is a Set iterator.
     */
    static isSetIterator(value?: any): value is IterableIterator<any>;
    /**
     * Checks whether the given value is of type `WeakSet`.
     *
     * @param {*} value Contains some value.
     * @return {Boolean} whether the given value is of type `WeakSet`.
     */
    static isWeakSet(value?: any): value is WeakSet<any>;
    /**
     * Converts a set to a map.
     *
     * @param {Set} value Contains some set.
     * @return {Map} a map whose keys are the indexes of each set value
     * and the respective values are the set items.
     */
    static toMap<T>(value: Set<T>): Map<number, T>;
}