import { IterableX } from '../../iterable/iterablex';
/**
 * @ignore
 */
export declare function expandProto<TSource>(this: IterableX<TSource>, fn: (value: TSource) => Iterable<TSource>): IterableX<TSource>;
declare module '../../iterable/iterablex' {
    interface IterableX<T> {
        expand: typeof expandProto;
    }
}