import { IterableX } from '../../iterable/iterablex';
/**
 * @ignore
 */
export declare function chainProto<TSource, TResult>(this: IterableX<TSource>, selector: (source: Iterable<TSource>) => Iterable<TResult>): IterableX<TResult>;
declare module '../../iterable/iterablex' {
    interface IterableX<T> {
        chain: typeof chainProto;
    }
}