Bug?

example.controllers.HomeController.d

module example.controllers.HomeController;

import serenity.core.Controller;

class HomeController : Controller {
    mixin register!(HomeController);
}

example.models.HomeModel.d

module example.models.HomeModel;

import serenity.core.Model;

struct Article {
    ulong id;
}

class HomeModel : Model {
    private SqlitePersister!Article mArticles;
}

serenity.core.Controller.d

class Controller {
    mixin template register(T : Controller) {
        enum _s_pkg = __traits(parent, __traits(parent, __traits(parent, T))).stringof["package ".length .. $];

        enum _s_model = T.stringof[0 .. $-`Controller`.length] ~ `Model`;
        mixin(q{enum _ = is(} ~ _s_pkg ~ q{.models.} ~ _s_model ~ q{.} ~ _s_model ~ q{ : serenity.core.Model.Model);});
    }
}

serenity.core.Model.d

class SqlitePersister(T) {
    static assert(T.tupleof.length > 0, T.stringof ~ `(` ~ (T.tupleof.length + '0') ~ `): ` ~ T.tupleof.stringof);
}

class Model {}