code: func TooFewItems(name, in string, min int64) *Validation {
  	msg := fmt.Sprintf(minItemsFail, name, in, min)
  	if in == "" {
  		msg = fmt.Sprintf(minItemsFailNoIn, name, min)
  	}
  	return &Validation{
  		code:    MinItemsFailCode,
  		Name:    name,
  		In:      in,
  		message: msg,
  	}
  }
docs: // TooFewItems error for when an array contains too few items