code: public CertificateInner get(String resourceGroupName, String automationAccountName, String certificateName) {
          return getWithServiceResponseAsync(resourceGroupName, automationAccountName, certificateName).toBlocking().single().body();
      }
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.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws ErrorResponseException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the CertificateInner object if successful.