How to use _start_apk_main_scene method in Airtest

...81        keyevent("HOME")82    def test_text(self):83        text("input")84    def test_touch_tpl(self):85        self._start_apk_main_scene()86        touch(TPL)87        self._start_apk_main_scene()88        with self.assertRaises(TargetNotFoundError):89            touch(TPL2)90    def test_wait(self):91        self._start_apk_main_scene()92        pos = wait(TPL)93        self.assertIsInstance(pos, (tuple, list))94        with self.assertRaises(TargetNotFoundError):95            wait(TPL2, timeout=5)96    def test_exists(self):97        self._start_apk_main_scene()98        pos = exists(TPL)99        self.assertIsInstance(pos, (tuple, list))100        self.assertFalse(exists(TPL2))101    def test_assert_exists(self):102        self._start_apk_main_scene()103        assert_exists(TPL)104        with self.assertRaises(AssertionError):105            assert_exists(TPL2)106    def test_assert_not_exists(self):107        self._start_apk_main_scene()108        assert_not_exists(TPL2)109        with self.assertRaises(AssertionError):110            assert_not_exists(TPL)111    def test_assert_equal(self):112        with self.assertRaises(AssertionError):113            assert_equal(1, 2)114        assert_equal(1, 1)115    def test_assert_not_equal(self):116        with self.assertRaises(AssertionError):117            assert_not_equal(1, 1)118        assert_not_equal(1, 2)119    def _start_apk_main_scene(self):120        if PKG not in self.dev.list_app():121            install(APK)122        stop_app(PKG)123        start_app(PKG)124    def test_log(self):125        log("hello world")126        log({"key": "value"}, timestamp=time.time(), desc="log dict")127        try:128            1 / 0129        except Exception as e:130            log(e)131if __name__ == '__main__':...