function CreateKnockBackViewModel(cust, orders) {
  var cvm = {
             Id: kb.observable(cust,'Id'),
             CompanyName: kb.observable(cust, 'CompanyName'),
             FirstName: kb.observable(cust, 'FirstName'),
             LastName: kb.observable(cust, 'LastName'),
             SalesOrderHeaders: kb.collectionObservable(orders)
           }
  return cvm;
}