code: public AppServiceCertificateOrderInner update(String resourceGroupName, String certificateOrderName, AppServiceCertificateOrderPatchResource certificateDistinguishedName) {
          return updateWithServiceResponseAsync(resourceGroupName, certificateOrderName, certificateDistinguishedName).toBlocking().single().body();
      }
docs: Create or update a certificate purchase order.
  Create or update a certificate purchase order.
  
  @param resourceGroupName Name of the resource group to which the resource belongs.
  @param certificateOrderName Name of the certificate order.
  @param certificateDistinguishedName Distinguished name to to use for the certificate order.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws DefaultErrorResponseException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the AppServiceCertificateOrderInner object if successful.