text: import React, { Component } from 'react'
  import  { DrawerNavigator } from 'react-navigation'
  
  import FirstScreen from './Page/First'
  import SecondScreen from './Page/Second'
  import ThirdScreen from './Page/Third'
  
  export default class Drawer extends Component{
      render(){
          return (
              <DrawerExample />
          );
      }
  }
  
  const DrawerExample = DrawerNavigator({
      First : FirstScreen,
      Second : SecondScreen,
      Third : ThirdScreen
  })