title: React Native json object does not show in ListView
body: <p>I'm new to RN and am trying to show a ListView populated with data from a json array, If I use a simple array then I can see the data however when I use the json array as shown in the code I don't see anything populated when I run the emulator. Is there a specific way to handle the json in my example below to show it in the ListView:</p>
  
  <pre><code>class FetchExample extends Component {
  
    constructor(props) {
      super(props);
      // Initialize the hardcoded test data - to be replaced by JOSN fetch
      let data = {"Vehicles":[[
        {"vehicle_make": "Toyota", 
        "vehicle_model": "Camry", 
        "vehicle_year": "2015", 
        "vehicle_price_range": "$$ (10-30)", 
        "car_id": 1127, 
        "vehicle_color": "Black", 
        "vehicle_car_accidents": "No", 
        "vehicle_no_owners": "1", 
        "car_vehicle_location": "Lot", 
        "vehicle_city_location": "L.A", 
        "vehicle_mileage": 10864, 
        "vehicle_vin": 1234, 
        "vehicle_off_lease": "Yes", 
        "vehicle_state": "CA"
      }]]};
      const ds = new ListView.DataSource({rowHasChanged: (r1, r2) =&gt; r1 !== r2});
      this.state = {
        dataSource: ds.cloneWithRows(data)
      };
      console.log(data);
    }
    render() {
      return (
        &lt;View style={{paddingTop: 22}}&gt;
          &lt;ListView
            dataSource={this.state.dataSource}
            renderRow={(rowData) =&gt; &lt;Text&gt;{rowData.Vehicles}&lt;/Text&gt;}
          /&gt;
        &lt;/View&gt;
      );
    }
  }
  </code></pre>