title: Need to show Expandable list view inside navigation drawer
body: <p>I am an Android Application Developer. I have started working on React-Native. I am unable to find a way to show expandable list inside navigation drawer. Suggest a library if this functionality can be done in that.<br /><br /> <code>navigationOptions</code> does not have a way to provide a list (refer code below). <br /><br />
  I want to show expandable view like item 4<br /><a href="https://i.stack.imgur.com/ARVkY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ARVkY.png" alt="I want to show expandable view like item 4"></a> 
  <br /><b>My Code is :-</b></p>
  
  <pre><code>import {DrawerNavigator} from 'react-navigation';
  import React, {Component} from 'react';
  import {
    Platform,
    StyleSheet,
    Text,
    Image,
    View,
    TouchableHighlight
  } from 'react-native';
  
  import Screen1 from './screen/Screen1'
  import Screen2 from './screen/Screen2'
  const util = require('util');
  
  class MyHomeScreen extends React.Component {
  
    constructor(props) {
      super(props);
  
      this.state = {
        headertitle: 'ffffff'
      };
    }
  
    componentWillReceiveProps(nextProps) {
      navigationOptions = {
        title: this.nextProps.headertitle
      };
    }
  
    static navigationOptions = {
      drawerLabel: 'Home',
      drawerIcon: ({tintColor}) =&gt; (
        &lt;Image
        source={require('./images/document.png')}
        style={[
        styles.icon, {
          tintColor: tintColor
        }
      ]}/&gt;),
      title: 'NIIT'
    };
  
    render() {
  
      return (&lt;Screen1/&gt;);
    }
  }
  
  class MyNotificationsScreen extends React.Component {
    static navigationOptions = {
      drawerLabel: 'Notifications',
      drawerIcon: ({tintColor}) =&gt; (&lt;Image source={require('./images/smartphone.png')} style={[styles.icon]}/&gt;),
      title: 'Gnome'
    };
  
    render() {
      return (&lt;Screen2/&gt;);
    }
  }
  
  const styles = StyleSheet.create({
    icon: {
      width: 24,
      height: 24
    }
  });
  
  const DrawerScreen = DrawerNavigator({
    Screen1: {
      screen: MyHomeScreen
    },
    Screen2: {
      screen: MyNotificationsScreen
    }
  }, {headerMode: 'none'})
  
  export default DrawerScreen;
  </code></pre>