code: func (f Flag) Int(name string) (int, error) {
  	v, err := f.value(name)
  	if err != nil {
  		return 0, err
  	}
  
  	i, err := strconv.Atoi(v)
  	if err != nil {
  		return 0, err
  	}
  
  	return i, nil
  }
docs: // Int returns an int if it exists in the set flags.