code: public Observable<SecretBundle> recoverDeletedSecretAsync(String vaultBaseUrl, String secretName) {
          return recoverDeletedSecretWithServiceResponseAsync(vaultBaseUrl, secretName).map(new Func1<ServiceResponse<SecretBundle>, SecretBundle>() {
              @Override
              public SecretBundle call(ServiceResponse<SecretBundle> response) {
                  return response.body();
              }
          });
      }
docs: Recovers the deleted secret to the latest version.
  Recovers the deleted secret in the specified vault. This operation can only be performed on a soft-delete enabled vault. This operation requires the secrets/recover permission.
  
  @param vaultBaseUrl The vault name, for example https://myvault.vault.azure.net.
  @param secretName The name of the deleted secret.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the SecretBundle object