[go_router_builder] Allow users to specify onExit as optional - #11151

[go_router_builder] Allow users to specify onExit as optional#11151

auto-submit[bot] merged 13 commits into

flutter:mainflutter/packages:mainfrom

hantrungkien:go-router-builder/support-on-exit-optionalhantrungkien/flutter_packages:go-router-builder/support-on-exit-optionalCopy head branch name to clipboard