/**
 * If the `globalThis` has a [`WritableStream`](https://developer.mozilla.org/en-US/docs/Web/API/WritableStream), or if the `node:stream/web` package has a `WritableStream`, then the `WritableStream` constructor.
 * Otherwise referencing it will throw a `ReferenceError`.
 *
 * - Browser
 * References the `globalThis.WritableStream`
 *
 * - Deno
 * References the `globalThis.WritableStream`
 *
 * - Node.js 18.0+
 * References the `globalThis.WritableStream`
 *
 * - Node.js 15.7+ or 14.18+
 * References the [`WritableStream`](https://nodejs.org/api/webstreams.html#class-writablestream) of `node:stream/web` package
 */
declare let _WritableStream: {
    prototype: WritableStream;
    new <T>(underlyingSink?: UnderlyingSink<T> | undefined, strategy?: QueuingStrategy<T> | undefined): WritableStream<T>;
};
export { _WritableStream };