| ⇢ | A | DateTimeTransformer added | |
| A | ↘ | B | FieldAbstract got worse |
| ⇢ | A | FieldAbstract::hasTransformer() added | |
| ⇢ | A | DateTimeTransformer::__construct() added | |
| ⇢ | A | DateTimeTransformer::input() added | |
| ⇢ | A | DateTimeTransformer::output() added | |
| ⇢ | A | FieldAbstract::setTransformer() added | |
| ⇢ | A | FieldAbstract::getTransformer() added |