text: import React from 'react';
  
  import { Navigation } from 'react-native-navigation';
  
  import {
    registerScreens,
    registerScreenVisibilityListener,
    DemoScreens,
  } from './Screens';
  
  registerScreens();
  registerScreenVisibilityListener();
  
  
  Navigation.startSingleScreenApp({
    screen: {
      screen: DemoScreens.MainScreen.id,
      title: DemoScreens.MainScreen.title,
      navigatorStyle: {},
      navigatorButtons: {}
    }
  });
  