code: public Observable<List<VnetRouteInner>> getRouteForVnetAsync(String resourceGroupName, String name, String vnetName, String routeName) {
          return getRouteForVnetWithServiceResponseAsync(resourceGroupName, name, vnetName, routeName).map(new Func1<ServiceResponse<List<VnetRouteInner>>, List<VnetRouteInner>>() {
              @Override
              public List<VnetRouteInner> call(ServiceResponse<List<VnetRouteInner>> response) {
                  return response.body();
              }
          });
      }
docs: Get a Virtual Network route in an App Service plan.
  Get 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.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the List&lt;VnetRouteInner&gt; object