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