import { AsyncIterableX } from './asynciterablex';
import { PartialAsyncObserver } from '../observer';
export declare class TapAsyncIterable<TSource> extends AsyncIterableX<TSource> {
    private _source;
    private _observer;
    constructor(source: AsyncIterable<TSource>, observer: PartialAsyncObserver<TSource>);
    [Symbol.asyncIterator](): AsyncIterableIterator<TSource>;
}
export declare function tap<TSource>(source: AsyncIterable<TSource>, observer: PartialAsyncObserver<TSource>): AsyncIterableX<TSource>;