This modification should not change anything logically.

Now you can call $ponderQuestion->isStatusClosed() that just returns true
for whatever closed status, and false otherwise.

The next step then is:

https://we.phorge.it/T15166

This is a very small change but this also adds two unit tests,
so there are more files edited than expected to keep the linter
happy.

Ref T15166

• Verify that nothing has changed logically