import { IterableX } from '../../iterable/iterablex';
/**
 * @ignore
 */
export declare function distinctUntilChangedProto<TSource, TKey>(this: IterableX<TSource>, keySelector?: (value: TSource) => TKey, cmp?: (x: TKey, y: TKey) => boolean): IterableX<TSource>;
declare module '../../iterable/iterablex' {
    interface IterableX<T> {
        distinctUntilChanged: typeof distinctUntilChangedProto;
    }
}