/// <reference types="node" />
import { Stream } from 'stream';
/**
 * Helper method that can be bound to a stream - it sets the output to utf-8, captures all of the results, and returns a promise that resolves to the final text
 * Essentially a smaller version of concat-stream wrapped in a promise
 *
 * @param {Stream} [stream] optional stream param for when not bound to an existing stream instance
 * @return {Promise}
 */
declare function promise(stream: Stream): Promise<any>;
export = promise;