import { AsyncIterableX } from './asynciterablex';
import { IRefCountList } from '../iterable/_refcountlist';
export declare class MemoizeAsyncBuffer<T> extends AsyncIterableX<T> {
    private _source;
    private _buffer;
    private _error;
    private _stopped;
    constructor(source: AsyncIterator<T>, buffer: IRefCountList<T>);
    [Symbol.asyncIterator](): AsyncIterableIterator<T>;
}
export declare function memoize<TSource>(source: AsyncIterable<TSource>, readerCount?: number): AsyncIterableX<TSource>;
export declare function memoize<TSource, TResult>(source: AsyncIterable<TSource>, readerCount?: number, selector?: (value: AsyncIterable<TSource>) => AsyncIterable<TResult>): AsyncIterableX<TResult>;