Function start

packages/react-server-dom-webpack/src/__tests__/ReactFlightDOM-test.js:146–153

(controller)

    const writable = new Stream.PassThrough();
    const readable = new ReadableStream({
      start(controller) {
        writable.on('data', chunk => {
          controller.enqueue(chunk);
        });
        writable.on('end', () => {
          controller.close();
        });
      },
    });
    return {
      readable,