code: public Observable<SiteSealInner> retrieveSiteSealAsync(String resourceGroupName, String certificateOrderName, SiteSealRequest siteSealRequest) {
          return retrieveSiteSealWithServiceResponseAsync(resourceGroupName, certificateOrderName, siteSealRequest).map(new Func1<ServiceResponse<SiteSealInner>, SiteSealInner>() {
              @Override
              public SiteSealInner call(ServiceResponse<SiteSealInner> response) {
                  return response.body();
              }
          });
      }
docs: Verify domain ownership for this certificate order.
  Verify domain ownership for this certificate order.
  
  @param resourceGroupName Name of the resource group to which the resource belongs.
  @param certificateOrderName Name of the certificate order.
  @param siteSealRequest Site seal request.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the SiteSealInner object