import { AsyncIterableX } from './asynciterablex';
export declare class PairwiseAsyncIterable<TSource> extends AsyncIterableX<TSource[]> {
    private _source;
    constructor(source: AsyncIterable<TSource>);
    [Symbol.asyncIterator](): AsyncIterableIterator<TSource[]>;
}
/**
 * Returns a new sequence that triggers on the second and subsequent triggerings of the input sequence.
 * @param {AsyncIterable<T>} source Source sequence.
 * @return {AsyncIterable<T[]>} A sequence that triggers on successive pairs of iterations from the input sequence.
 */
export declare function pairwise<TSource>(source: AsyncIterable<TSource>): AsyncIterableX<TSource[]>;