Method getBodyElement

src/friendly-iframe-embed.js:548–552

* @return {!HTMLBodyElement} * @visibleForTesting

()

   * @visibleForTesting
   */
  getBodyElement() {
    return /** @type {!HTMLBodyElement} */ (
      (this.iframe.contentDocument || this.iframe.contentWindow.document).body
    );
  }

  /**
   * Force remeasure inside FIE doc when iframe is resized.