/** {@inheritDoc} */
 @Override
 protected void loadValidatedSettingsFrom(NodeSettingsRO settings)
     throws InvalidSettingsException {
   GoogleApiConnectorNodeConfiguration config = new GoogleApiConnectorNodeConfiguration();
   config.loadInModel(settings);
   m_config = config;
 }
  /** {@inheritDoc} */
  @Override
  protected void validateSettings(NodeSettingsRO settings) throws InvalidSettingsException {
    GoogleApiConnectorNodeConfiguration config = new GoogleApiConnectorNodeConfiguration();
    config.loadInModel(settings);

    if (StringUtils.isEmpty(config.getRefreshToken())) {
      throw new InvalidSettingsException("Refresh token is required");
    }
  }