code: public Observable<Page<RunInner>> listAsync(final String resourceGroupName, final String registryName) {
          return listWithServiceResponseAsync(resourceGroupName, registryName)
              .map(new Func1<ServiceResponse<Page<RunInner>>, Page<RunInner>>() {
                  @Override
                  public Page<RunInner> call(ServiceResponse<Page<RunInner>> response) {
                      return response.body();
                  }
              });
      }
docs: Gets all the runs for a registry.
  
  @param resourceGroupName The name of the resource group to which the container registry belongs.
  @param registryName The name of the container registry.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;RunInner&gt; object