code: public ServiceFuture<CertificateInner> getAsync(String resourceGroupName, String automationAccountName, String certificateName, final ServiceCallback<CertificateInner> serviceCallback) {
          return ServiceFuture.fromResponse(getWithServiceResponseAsync(resourceGroupName, automationAccountName, certificateName), serviceCallback);
      }
docs: Retrieve the certificate identified by certificate name.
  
  @param resourceGroupName Name of an Azure Resource group.
  @param automationAccountName The name of the automation account.
  @param certificateName The name of 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