Correctly handle tasks with no project.
Add support for periods of service.
Add check for employee active during week in question.
Add adapters for Range.
Remove diagnostic.
Simplify and use Iterable instead of Collection where possible.
Simplify and use Iterable instead of Collection where possible.
Simplify and use Iterable instead of Collection where possible.
Simplify and use Iterable instead of Collection where possible.
Simplify and use Iterable instead of Collection where possible.