…alization on SymfonyRuntime (l-vo)This PR was merged into the 6.4 branch.Discussion----------[Runtime] Fix property must not be accessed before initialization on SymfonyRuntime| Q             | A| ------------- | ---| Branch?       | 6.4| Bug fix?      | yes| New feature?  | no| Deprecations? | no| Tickets       || License       | MIT| Doc PR        | symfony/symfony-docs#... <!-- required for new features -->Introduced by#51068, see#51068 (comment)Commits-------dd3c406 Fix property must not be accessed before initialization on SymfonyRuntime::$input

…grekas)This PR was merged into the 7.0 branch.Discussion----------Add types to public and protected properties| Q             | A| ------------- | ---| Branch?       | 7.0| Bug fix?      | no| New feature?  | yes| Deprecations? | no| Tickets       | -| License       | MIT| Doc PR        | -:hot_face:Allowed by#45360Follows#51068 and#51067Commits-------7ea2461 Add types to public and protected properties

…ulting in bad argument (weaverryan)This PR was squashed before being merged into the 6.4 branch.Discussion----------[Process] Fix bug where $this->callback is never null, resulting in bad argument| Q             | A| ------------- | ---| Branch?       | 6.4| Bug fix?      | yes| New feature?  | no| Deprecations? | no| Tickets       | None| License       | MIT| Doc PR        | Not neededHi!Caused by#51068 - by the time `$this->getDescriptors()` is called, `$this->callback` is ALWAYS a callable thanks to `$this->callback = $this->buildCallback($callback)`.Previously, there was a separate `hasCallback` property that handled this logic. I chose to NOT re-add that because it was only needed in `getDescriptors()` and that is only called from this one place: easier to pass `$hasCallback` as an argument.Caught by the symfony/ux test suite ❤️Cheers!Commits-------95aa236 [Process] Fix bug where $this->callback is never null, resulting in bad argument