// Dummy functions to be overwritten by any datastore plugin included
			load_node	: function (obj, s_call, e_call) { this.__callback({ "obj" : obj }); },
			_is_loaded	: function (obj) { return true; },

			// Basic operations: create
			create_node	: function (obj, position, js, callback, is_loaded) {
				obj = this._get_node(obj);
				position = typeof position === "undefined" ? "last" : position;
				var d = $("<li />"),