| ⇢ | A | RequiredValidator added | |
| ⇢ | A | RuleValidatorFactory added |
| ⇢ | A | RequiredValidator::verdict() added | |
| ⇢ | A | RuleValidatorFactory::getInstance() added | |
| ⇢ | A | Rule::validatedBy() added | |
| ⇢ | A | Validator::__construct() added | |
| A | ↘ | B | Validator::validate() got worse |
| A | ↛ | Required::verdict() removed | |
| A | ↛ | Rule::getFieldName() removed |