code: function render({ document }) {
    console.debug("rendering");
    document.querySelectorAll(".replace-with-pubcontrol").forEach(el => {
      el.innerHTML = `
      <div>
        <h2>pubcontrol default export</h2>
        <pre>${JSON.stringify(objectSchema(PubControl), null, 2)}</pre>
      </div>
      `;
    });
  }
docs: Render a message showing off pubcontrol.
  Show it wherever the html has opted into replacement.