code: func JoinMountOptions(userOptions []string, systemOptions []string) []string {
  	allMountOptions := sets.NewString()
  
  	for _, mountOption := range userOptions {
  		if len(mountOption) > 0 {
  			allMountOptions.Insert(mountOption)
  		}
  	}
  
  	for _, mountOption := range systemOptions {
  		allMountOptions.Insert(mountOption)
  	}
  	return allMountOptions.List()
  }
docs: // JoinMountOptions joins mount options eliminating duplicates