Problem:    Imported class does not work when used twice in a line.
Solution:   Fix the type parsing.

Problem:    Using class from imported script not tested.
Solution:   Add tests.  Implement what is missing.

Problem:    Interface of an object is not recognized when checking type.
Solution:   Use the interface implemented by an object.

Problem:    Code is indented more than necessary.
Solution:   Use an early return where it makes sense. (Yegappan Lakshmanan,
            closes #11805)

Problem:    go checksum files are not recognized.
Solution:   Add the name of go checksum files. (Amaan Qureshi, closes #11803)

Problem:    Class inheritance and typing insufficiently tested.
Solution:   Add more tests.  Implement missing behavior.

Problem:    Compiler warnings without the +job feature.
Solution:   Adjust #ifdefs. (John Marriott)

Problem:    Not all errors around inheritance are tested.
Solution:   Add more tests.  Fix uncovered problems.

Problem:    A child class cannot override functions from a base class.
Solution:   Allow overriding and implement "super".

Problem:    AppVeyor uses some older tools.
Solution:   Switch to Visual Studio 2022 and Python 3.11. (Christopher
            Plewright, closes #11793)