/// <reference types="node" />
import { PassThrough } from 'stream';
/**
 * A transform stream prepend-ing a string before the stream.
 */
export default class Prepender extends PassThrough {
    /**
     * Create the prepend-er constructor.
     *
     * @param prepend - The string to be prepended to the stream.
     */
    constructor(prepend: string);
}