code: public Observable<SecretBundle> restoreSecretAsync(String vaultBaseUrl, byte[] secretBundleBackup) {
          return restoreSecretWithServiceResponseAsync(vaultBaseUrl, secretBundleBackup).map(new Func1<ServiceResponse<SecretBundle>, SecretBundle>() {
              @Override
              public SecretBundle call(ServiceResponse<SecretBundle> response) {
                  return response.body();
              }
          });
      }
docs: Restores a backed up secret to a vault.
  Restores a backed up secret, and all its versions, to a vault. This operation requires the secrets/restore permission.
  
  @param vaultBaseUrl The vault name, for example https://myvault.vault.azure.net.
  @param secretBundleBackup The backup blob associated with a secret bundle.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the SecretBundle object