phpstan: 4 failed, 4 total tests

Working on it.

Fixed phpstan errors, Please review.

The pipeline for phpstan is green. Moving it to RTBC.

The work done in 🐛 phpunit: 7 errors, 7 total tests Active incorporates the changes needed here.
The test results with the fix can be viewed at: https://git.drupalcode.org/project/dopl/-/merge_requests/8
When that gets merged, it would have allowed this to be merged, but will also fix this issue.