code: public ServiceFuture<Void> purgeDeletedSecretAsync(String vaultBaseUrl, String secretName, final ServiceCallback<Void> serviceCallback) {
          return ServiceFuture.fromResponse(purgeDeletedSecretWithServiceResponseAsync(vaultBaseUrl, secretName), serviceCallback);
      }
docs: Permanently deletes the specified secret.
  The purge deleted secret operation removes the secret permanently, without the possibility of recovery. This operation can only be enabled on a soft-delete enabled vault. This operation requires the secrets/purge permission.
  
  @param vaultBaseUrl The vault name, for example https://myvault.vault.azure.net.
  @param secretName The name of the secret.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object