code: func (fac FileAvailableCheck) Check() (warnings, errorList []error) {
  	klog.V(1).Infof("validating the existence of file %s", fac.Path)
  	errorList = []error{}
  	if _, err := os.Stat(fac.Path); err == nil {
  		errorList = append(errorList, errors.Errorf("%s already exists", fac.Path))
  	}
  	return nil, errorList
  }
docs: // Check validates if the given file does not already exist.