RN-RNav- 3 - RootNavigator combining internal and external screens

RN-RNav-3-RootNavigator.js

import React from "react";
import {StackNavigator} from "react-navigation";
import LoginScreen from "./internal/Login";
import HomeScreen from "./external/Home";

export default StackNavigator(
  {
    External: {screen: LoginScreen},
    Internal: {screen: HomeScreen}
  },
  {
    initialRouteName: "Internal"
  }
);