classmameChose::AppStatesys::Obj mameChose::AppState@SerializableAppState State persistance (UI state)loadstatic AppState load()makenew make(|This f)restoreTo Void restoreTo(MainCanvas ui)save Void save()updateCtxSelection Void updateCtxSelection(Str itemName)updateCurRom Void updateCurRom(Str romName)updateFilter Void updateFilter(RomListFilter filter)updateNav Void updateNav(Str navName)