code: public Observable<VnetRouteInner> updateVnetRouteAsync(String resourceGroupName, String name, String vnetName, String routeName, VnetRouteInner route) {
          return updateVnetRouteWithServiceResponseAsync(resourceGroupName, name, vnetName, routeName, route).map(new Func1<ServiceResponse<VnetRouteInner>, VnetRouteInner>() {
              @Override
              public VnetRouteInner call(ServiceResponse<VnetRouteInner> response) {
                  return response.body();
              }
          });
      }
docs: Create or update a Virtual Network route in an App Service plan.
  Create or update a Virtual Network route in an App Service plan.
  
  @param resourceGroupName Name of the resource group to which the resource belongs.
  @param name Name of the App Service plan.
  @param vnetName Name of the Virtual Network.
  @param routeName Name of the Virtual Network route.
  @param route Definition of the Virtual Network route.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the VnetRouteInner object