code: public ServiceFuture<CertificateBundle> getCertificateAsync(String vaultBaseUrl, String certificateName,
              final ServiceCallback<CertificateBundle> serviceCallback) {
          return getCertificateAsync(vaultBaseUrl, certificateName, "", serviceCallback);
      }
docs: Gets information about a specified certificate.
  
  @param vaultBaseUrl
  The vault name, e.g. https://myvault.vault.azure.net
  @param certificateName
  The name of the certificate in the given vault
  @param serviceCallback
  the async ServiceCallback to handle successful and failed
  responses.
  @return the {@link ServiceFuture} object