// Provide a default path to dwr.engine
if (dwr == null) var dwr = {};
if (dwr.engine == null) dwr.engine = {};
if (DWREngine == null) var DWREngine = dwr.engine;

if (CartService == null) var CartService = {};
CartService._path = '/dwr';
CartService.getShoppingCartSummary = function(callback) {
  dwr.engine._execute(CartService._path, 'CartService', 'getShoppingCartSummary', false, callback);
}