import { IEnumerable } from '../enumerable';
import { Comparer, ResultSelector } from '../types';
import { Iterator } from './iterator';
export declare class OrderedEnumerable<TSource, TKey> extends Iterator<TSource> {
    source: IEnumerable<TSource>;
    keySelector: ResultSelector<TSource, TKey>;
    comparer: Comparer<TKey, TKey>;
    constructor(source: IEnumerable<TSource>, keySelector: ResultSelector<TSource, TKey> | undefined, comparer: Comparer<TKey, TKey>, descending: boolean);
    moveNext(): boolean;
}