_updateBookmark(newBookmark) {
    if (newBookmark && !newBookmark.isEmpty()) {
      this._lastBookmark = newBookmark;
    }
  }
/**
   * Update value of the last bookmark.
   * @param {Bookmark} newBookmark the new bookmark.
   */
Update value of the last bookmark.
@param {Bookmark} newBookmark the new bookmark.
Update value of the last bookmark . @param { Bookmark } newBookmark the new bookmark .
_updateBookmark(newBookmark) {
    if (newBookmark && !newBookmark.isEmpty()) {
      this._lastBookmark = newBookmark;
    }
  }
_updateBookmark ( newBookmark ) { if ( newBookmark && ! newBookmark . isEmpty ( ) ) { this . _lastBookmark = newBookmark ; } }
Update value of the last bookmark.
Update value of the last bookmark .