code: protected final void validateSuccess(final Status status) {
          String statusValue = status.getStatusCode().getValue();
          if (!StatusCode.SUCCESS.equals(statusValue)) {
              final StatusMessage statusMessage = status.getStatusMessage();
              if (statusMessage != null) {
                  statusValue += " / " + statusMessage.getMessage();
              }
              throw new SAMLException("Response is not success ; actual " + statusValue);
          }
      }
docs: Validates that the response is a success.
  
  @param status the response status.