code: func validateServiceConfig(cc *svcconfig.Config) error {
  	switch {
  	case cc == nil:
  		return errors.New("configuration is nil")
  	case cc.GetCoordinator() == nil:
  		return errors.New("no Coordinator configuration")
  	default:
  		return nil
  	}
  }
docs: // validateServiceConfig checks the supplied service config object to ensure
  // that it meets a minimum configuration standard expected by our endpoitns and
  // handlers.