/**
  * Return the node's parent node.
  * @param FOLDER $node
  * @return FOLDER
  * @access private
  */
 public function parent($node)
 {
     return $node->parent_folder();
 }
 /**
  * Add a folder as the current location.
  * The folder itself is displayed as text, while its parents are listed to the left
  * of it as links.
  * @see add_folder_link()
  * @param FOLDER $folder
  */
 public function add_folder_text($folder)
 {
     $this->add_folder_link($folder->parent_folder());
     $t = $folder->title_formatter();
     $t->max_visible_output_chars = 0;
     $this->append($folder->title_as_html($t), '', $folder->icon_url);
 }