import { AsyncIterableX } from '../asynciterablex';
import { MonoTypeOperatorAsyncFunction } from '../../interfaces';
export declare class ExpandAsyncIterable<TSource> extends AsyncIterableX<TSource> {
    private _source;
    private _selector;
    constructor(source: AsyncIterable<TSource>, selector: (value: TSource) => AsyncIterable<TSource> | Promise<AsyncIterable<TSource>>);
    [Symbol.asyncIterator](): AsyncGenerator<TSource, void, unknown>;
}
export declare function expand<TSource>(selector: (value: TSource) => AsyncIterable<TSource> | Promise<AsyncIterable<TSource>>): MonoTypeOperatorAsyncFunction<TSource>;