code: public Observable<Page<RouteInner>> listAsync(final String resourceGroupName, final String routeTableName) {
          return listWithServiceResponseAsync(resourceGroupName, routeTableName)
              .map(new Func1<ServiceResponse<Page<RouteInner>>, Page<RouteInner>>() {
                  @Override
                  public Page<RouteInner> call(ServiceResponse<Page<RouteInner>> response) {
                      return response.body();
                  }
              });
      }
docs: Gets all routes in a route table.
  
  @param resourceGroupName The name of the resource group.
  @param routeTableName The name of the route table.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;RouteInner&gt; object