The thing with just using true is `initialize` and `shutdown` are pretty generic as function export names, which precludes a package being a Laika plug-in and something else at the same time (like, I could release a package that does some useful stuff but it also comes with its own Laika plug-in). So I'd tend to point it to a module or a symbol.

Alternatively, as a shortcut, we could both do that *and* accept `true` to mean the helper === the package itself.