import { AsyncIterableX } from './asynciterablex';
export declare class FlatMapAsyncIterable<TSource, TResult> extends AsyncIterableX<TResult> {
    private _source;
    private _selector;
    constructor(source: AsyncIterable<TSource>, selector: (value: TSource) => AsyncIterable<TResult> | Promise<AsyncIterable<TResult>>);
    [Symbol.asyncIterator](): AsyncIterableIterator<TResult>;
}
export declare function flatMap<TSource, TResult>(source: AsyncIterable<TSource>, selector: (value: TSource) => AsyncIterable<TResult> | Promise<AsyncIterable<TResult>>, thisArg?: any): AsyncIterableX<TResult>;