This PR was merged into the 4.3 branch.Discussion----------Change type hints| Q             | A| ------------- | ---| Branch?       | 4.3 for features / 3.4, 4.2 or 4.3 for bug fixes <!-- see below -->| Bug fix?      | yes| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->| BC breaks?    | no     <!-- seehttps://symfony.com/bc -->| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->| Fixed tickets | n/a| License       | MIT| Doc PR        | n/asee#31774 (comment)<!--Replace this notice by a short README for your feature/bugfix. This will help peopleunderstand your PR and can be used as a start for the documentation.Additionally (seehttps://symfony.com/roadmap): - Bug fixes must be submitted against the lowest maintained branch where they apply   (lowest branches are regularly merged to upper ones so they get the fixes too). - Features and deprecations must be submitted against branch 4.4. - Legacy code removals go to the master branch.-->Commits-------d56ae06 changed type hints