I have tested this item ✅ successfully on 59e0991

I have tested this succesfully.

I have specifically tested:

com_banners
com_cache
com_checkin
com_config
com_contact
com_guidedtours
com_languages
com_newsfeeds
com_scheduler
com_tags
com_users

I have tested this item ✅ successfully on 59e0991

Tested some randomly chosen views, no errores found

RTC

I have tested this item ✅ successfully on 59e0991

Tested with JBT from pre-build Joomla_6.0.0-alpha3-dev+pr.45694-Development-Full_Package.zip

• com_banners: created, listes, batch copied
• com_contact: created, listed, all fields used, batch copied + moved
• com_users: created, all fields used, batch group assigned, deleted
• com_plugins: enabled, disabled, list view, and pulgin detail view
• com_modules: installed zitat-service.de from JED configured and tested on frontpage

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  _{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/45694.}

It seems this PR introduces new phpstan errors, see the phpstan notices below the changes in the changed files of this PR. The errors should either be fixed (if possible without b/c break) or be added to the phpstan-baseline.neon file. The easiest way to to the latter is to run composer install and then ./libraries/vendor/bin/phpstan -b to update the phpstan-baseline.neon file. That can also be done after some of the errors were fixed so only the remaining errors are added to the file.

thank you @Fedik and all the testers and reviewers who put the time in