| ⇢ | A | AttributesHelper added | |
| B | ↗ | A | AttributesListener improved |
| A | ↛ | AttributesParserTrait removed |
| ⇢ | C | AttributesHelper::parseAttributes() added | |
| ⇢ | B | AttributesHelper::mergeAttributes() added | |
| C | ↛ | AttributesParserTrait::parseAttributes() removed | |
| B | ↛ | AttributesListener::merge() removed |