| A | ↘ | B | FileHandler got worse |
| ⇢ | A | FileHandler::guessMimeType() added | |
| ⇢ | A | FileHandler::getExtensions() added | |
| ⇢ | A | MediaBuilder::guessMimeType() added | |
| ⇢ | A | HasGuessableExtensionValidator::__construct() added | |
| ⇢ | A | HasGuessableExtensionValidator::guessMimeType() added | |
| ⇢ | A | HasGuessableExtensionValidator::getExtension() added | |
| A | ↘ | B | FileHandler::__construct() got worse |