def __init__(self, app: QtApplication) -> None:
super().__init__(app)
self.packageMutations = Signal() # Emits SubscribedPackagesModel
self._app = app
self._package_manager = app.getPackageManager()
self._dialog = None # type: Optional[QObject]
self._compatibility_dialog_path = "resources/qml/dialogs/CompatibilityDialog.qml"
