redux router example

reduxrouter.js

export default function AppContainer() {
	return (
		<View style={AppStyles.container}>
			<Provider store={store}>
				<RouterWithRedux scenes={AppRoutes} style={AppStyles.appContainer}/>
			</Provider>
			<DropdownAlert ref={ref => DropDownHolder.setDropDown(ref)} closeInterval={6000}/>
		</View>
	);
}

how we use this on our screens after this implementation. Please add an example

DropDownHolder.getDropDown().alertWithType('error', 'Title', 'Message')

Getting Can't find variable DropDownHolder

please give complete code

this shows blank white screen if not added inside routes