code: public ServiceFuture<AppServiceCertificateResourceInner> getCertificateAsync(String resourceGroupName, String certificateOrderName, String name, final ServiceCallback<AppServiceCertificateResourceInner> serviceCallback) {
          return ServiceFuture.fromResponse(getCertificateWithServiceResponseAsync(resourceGroupName, certificateOrderName, name), serviceCallback);
      }
docs: Get the certificate associated with a certificate order.
  Get the certificate associated with a certificate order.
  
  @param resourceGroupName Name of the resource group to which the resource belongs.
  @param certificateOrderName Name of the certificate order.
  @param name Name of the certificate.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object