{
                    auto list = nested2.list("systemTypes");
                    for (auto & s : m->systemTypes)
                        list.elem(s);
                }
                {
                    auto list = nested2.list("supportedFeatures");
                    for (auto & s : m->supportedFeatures)
                        list.elem(s);
                }
                {
                    auto list = nested2.list("mandatoryFeatures");
                    for (auto & s : m->mandatoryFeatures)
                        list.elem(s);
                }