code: def order(self, *args):
      
      # q.order(Employee.name, -Employee.age)
      if not args:
        return self
      orders = []
      o = self.orders
      if o:
        orders.append(o)
      for arg in args:
        if isinstance(arg, model.Property):
          orders.append(datastore_query.PropertyOrder(arg._name, _ASC))
        elif isinstance(arg, datastore_query.Order):
          orders.append(arg)
        else:
          raise TypeError('order() expects a Property or query Order; '
                          'received %r' % arg)
      if not orders:
        orders = None
      elif len(orders) == 1:
        orders = orders[0]
      else:
        orders = datastore_query.CompositeOrder(orders)
      return self.__class__(kind=self.kind, ancestor=self.ancestor,
                            filters=self.filters, orders=orders,
                            app=self.app, namespace=self.namespace,
                            default_options=self.default_options,
                            projection=self.projection, group_by=self.group_by)
docs: Return a new Query with additional sort order(s) applied.