MultiDenugEntry.js

import {AppRegistry} from 'react-native';
/** @format */

import {} from 'react-native';
import App from './App';
import {name as appName} from './app.json';

AppRegistry.registerComponent(appName, () => App);
/** @format */

import {} from 'react-native';
import App2 from './App2';

AppRegistry.registerComponent("reactnative_multibundler2", () => App2);
/** @format */

import {} from 'react-native';
import {createStackNavigator} from "react-navigation";
import {App3_1,App3_2} from "./App3";
const App3 = createStackNavigator({
  App3_1: {screen: App3_1},
  App3_2: {screen: App3_2}
}, {
  navigationOptions: {
    showIcon: true,
    swipeEnabled: false,
    animationEnabled: false,
    lazy: true,
  },
  mode: 'card'
});

AppRegistry.registerComponent("reactnative_multibundler3", () => App3);