code: function(separator) {
  		separator = separator || ".";
  		var res = [];
  		$.each(this.getParentList(false, true), function(i, o){
  			res.push(o.getIndex() + 1);
  		});
  		return res.join(separator);
  	}
docs: Return the hierarchical child index (1-based, e.g. '3.2.4').
  @returns {string}