code: func (v *StringsMatch) IsValid(errors *validate.Errors) {
  	if strings.TrimSpace(v.Field) != strings.TrimSpace(v.Field2) {
  		if v.Message == "" {
  			v.Message = fmt.Sprintf("%s does not equal %s.", v.Field, v.Field2)
  		}
  		errors.Add(GenerateKey(v.Name), v.Message)
  	}
  }
docs: // IsValid performs the validation equality of two strings.