code: func (o *Options) Complete() error {
  	if len(o.ConfigFile) == 0 && len(o.WriteConfigTo) == 0 {
  		klog.Warning("WARNING: all flags other than --config, --write-config-to, and --cleanup are deprecated. Please begin using a config file ASAP.")
  		o.config.HealthzBindAddress = addressFromDeprecatedFlags(o.config.HealthzBindAddress, o.healthzPort)
  		o.config.MetricsBindAddress = addressFromDeprecatedFlags(o.config.MetricsBindAddress, o.metricsPort)
  	}
  
  	// Load the config file here in Complete, so that Validate validates the fully-resolved config.
  	if len(o.ConfigFile) > 0 {
  		c, err := o.loadConfigFromFile(o.ConfigFile)
  		if err != nil {
  			return err
  		}
  		o.config = c
  
  		if err := o.initWatcher(); err != nil {
  			return err
  		}
  	}
  
  	if err := o.processHostnameOverrideFlag(); err != nil {
  		return err
  	}
  
  	if err := utilfeature.DefaultMutableFeatureGate.SetFromMap(o.config.FeatureGates); err != nil {
  		return err
  	}
  	return nil
  }
docs: // Complete completes all the required options.