Step.sync(() => {
          const tree = EditorContent.getContent(editor, { format: 'tree' }) as Node;
          Assertions.assertHtml('Should be expected tree html', '<p>tree</p>', toHtml(tree));

          EditorContent.setContent(editor, '<p>new html</p>');
          Assertions.assertHtml('Should be expected html', '<p>new html</p>', EditorContent.getContent(editor));

          EditorContent.setContent(editor, tree);
          Assertions.assertHtml('Should be expected tree html', '<p>tree</p>', EditorContent.getContent(editor));
        })

   * @return {String} HTML string that got set into the editor.
   * @example
   * // Sets the HTML contents of the activeEditor editor
   * tinymce.activeEditor.setContent('<span>some</span> html');
   *
   * // Sets the raw contents of the activeEditor editor
   * tinymce.activeEditor.setContent('<span>some</span> html', {format: 'raw'});
   *
   * // Sets the content of a specific editor (my_editor in this example)
   * tinymce.get('my_editor').setContent(data);
   *
   * // Sets the bbcode contents of the activeEditor editor if the bbcode plugin was added
   * tinymce.activeEditor.setContent('[b]some[/b] html', {format: 'bbcode'});
   */
  setContent (content: EditorContent.Content, args?: EditorContent.SetContentArgs): EditorContent.Content {
    return EditorContent.setContent(this, content, args);
  },

  /**
   * Gets the content from the editor instance, this will cleanup the content before it gets returned using
   * the different cleanup rules options.
   *
   * @method getContent
   * @param {Object} args Optional content object, this gets passed around through the whole get process.
   * @return {String} Cleaned content string, normally HTML contents.
   * @example
   * // Get the HTML contents of the currently active editor
   * console.debug(tinymce.activeEditor.getContent());
   *
   * // Get the raw contents of the currently active editor
   * tinymce.activeEditor.getContent({format: 'raw'});

 Step.sync(() => {
   EditorContent.setContent(editor, getFontTree());
   Assertions.assertHtml('Should be expected filtered html', '<span style="font-size: 300%;">x</span>', EditorContent.getContent(editor));
 })

 Step.sync(function () {
   EditorContent.setContent(editor, '<p>new html</p>');
 }),