def METHOD_NAME(self):
    try:
        self._proxy = Gio.DBusProxy.new_for_bus(Gio.BusType.SESSION,
                                                Gio.DBusProxyFlags.NONE,
                                                None,
                                                LG_DBUS_NAME,
                                                LG_DBUS_PATH,
                                                LG_DBUS_NAME,
                                                None,
                                                self.on_proxy_ready,
                                                None)
    except GLib.Error as e:
        print(e.message)
        self._proxy = None