code: public ServiceFuture<RouteTableInner> beginCreateOrUpdateAsync(String resourceGroupName, String routeTableName, RouteTableInner parameters, final ServiceCallback<RouteTableInner> serviceCallback) {
          return ServiceFuture.fromResponse(beginCreateOrUpdateWithServiceResponseAsync(resourceGroupName, routeTableName, parameters), serviceCallback);
      }
docs: Create or updates a route table in a specified resource group.
  
  @param resourceGroupName The name of the resource group.
  @param routeTableName The name of the route table.
  @param parameters Parameters supplied to the create or update route table operation.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object