Function _render

docs/app/js/sanddance-app.js:123502–123502

* Internal rendering method. Renderer subclasses should override this * method to actually perform rendering. * @param {object} scene - The root mark of a scenegraph to render.

()

   * method to actually perform rendering.
   * @param {object} scene - The root mark of a scenegraph to render.
   */ _render () /*scene*/ {},
    /**
   * Asynchronous rendering method. Similar to render, but returns a Promise
   * that resolves when all rendering is completed. Sometimes a renderer must